Phrase searching - use of quotation marks or brackets or the choice to search for exact words. Some search engines have this feature built in, others do not. Case Sensitivity - some search engines will ignore whether your keywords have capital letters but others will search for an exact match. It is important to understand that the World Wide Web is a mass on totally unedited data. The Web contains a large amount of material which is purely entertainment or advertising, and sometimes Webpages can be cluttered with many links to such sources.
Web resources can also disappear as quickly as they have appeared, for a variety of reasons.
It is important to remember that anyone with Internet access can put information on the Web. It is important to evaluate any information before using it , but particularly information found via the Internet because it has not necessarily been subjected to the evaluation processes normally applied to print resources. Accuracy - anyone can put information on World Wide Web and claim it to be true. Check for any date information. For example, information from a beef products company is not going to present information which is pro vegetarian lifestyle.