Search Engine Usage Tips

The search engine is to help us to easily query information on the Internet, but when you enter keywords, there are hundreds of results. Each search engine has its own query method, and you can use it only if you master it. The search methods provided by different search engines are not exactly the same. If you want to specifically understand them, you can go to each site to query. However, there are some general query methods. Each search engine is basically the same. The following is a brief introduction.
Since the use of directory queries is relatively simple, you only need to determine the directory where you want to find the target, and then open it one layer at a time and refine it to find it. So we mainly introduce the use of keywords to query below.
1, simple query in the search engine to enter keywords, and then enter the line on the line, the system will quickly return the query results, this is the simplest query method, easy to use, but the query results are not accurate, may contain many useless Information.
2, use double quotation marks ()
Adding double quotation marks (half angles, other symbols to be added below) to the keywords to be queried can achieve accurate queries. This method requires that the query results should be accurately matched, not including the evolution form. For example, enter "wrapper" in the search engine's text box and it will return the web page with the URL of the "wrapper" keyword, instead of returning a page such as a "skin bag suit."
3, use the plus sign (+)
By using a plus sign in front of the keyword, it is equivalent to telling the search engine that the word must appear on the web page in the search result. For example, entering “+plastic+pack+quote” in the search engine means that the content to be searched must be At the same time, it contains three keywords: "plastic, packaging, and quotation."
4, use the minus sign (-)
The use of a minus sign in front of the keyword means that the keyword cannot appear in the query result. For example, if you enter “packaging-packaging machinery” in the search engine, it means that the final query result must not include “packaging”. mechanical".
5. Use wildcards (* and ?)
Wildcards include asterisks (*) and question marks (?). The former indicates that the number of matches is not limited, and the latter matches the number of characters to be limited, and is mainly used in English search engines. For example, if you type "computer*", you can find words such as "computer, computers, computerized," and if you type "comp?ter," you can only find words such as "computer, competer."
6, using Boolean search Boolean search, refers to the standard Boolean logic to express the logical relationship between keywords and keywords of a query method, this query method allows us to enter multiple keywords, each keyword Relationships can be expressed in logical terms.
And, called logical "and", connect with and, indicating that the two words it connects must appear in the query result at the same time, for example, enter "package and metal", it requires that the query result must also include "package" And "metal".
Or, called logical "or", it means that any of the two keywords that are connected can appear in the query result. For example, if you enter "wrapper or metal", you only need to specify "package" in the query result, or Only "metal" or both "packaging" and "metal".
Not, called logical "non-", it means that the second keyword should be excluded from the first keyword concept in two connected keywords. For example, if you enter "not packaged metal", the result of the query needs to include " Packaging, but it cannot include "metal" at the same time.
Near, it means that the distance between two keywords cannot exceed n words.
In the actual use, you can use a variety of logical relationships, flexible collocation for more complex queries.
7. Use parentheses When two keywords are joined together with another operator and you want to group them together, you can use parentheses around the two words.
8. Use the retrieval of the meta words Most search engines support the metawords function. According to this type of function, the user places the meta word in front of the keyword, so that you can tell the search engine what you want to retrieve. Clear characteristics. For example, if you enter "title: China Packaging Network" in the search engine, you can find the web page with the Chinese packaging network in the title of the page. After adding the keyword "domain:org", you can find all websites with org suffixes.
Other meta-words also include: image: used to retrieve pictures, link: used to retrieve pages that link to a selected site, and URL: used to retrieve pages with a keyword in the address.
9. Case sensitivity This is a problem to be noted when searching English information. Many English search engines allow the user to choose whether or not to distinguish the case of keywords. This feature is very helpful for querying proper nouns. For example: Web refers specifically to the World Wide Web or the Internet, while web refers to the spider web.