A 'simple' search is normally enough to get to the web site you want to visit.
With Advanced or 'Complex' Search, you can search for pages:
>that contain ALL the search terms you type in
>that contain the exact phrase you type in
>that contain at least one of the words you type in
>that do NOT contain any of the words you type in
>written in a certain language
and so on. You do this by following the rules each search engine or database provides.
For example Pear AND tree is saying that both words need to appear in the page.
See 'Advanced Search' link on the Google home page
Challenge see if you can find out one extra fact on this topic that we haven't already told you
Click on this link: Complex Search
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