• First of all, our search engine is not case sensitive, so using or not using capital letters won't affect the results. And in most cases you don't have to put a phrase within quotations ("..."). There is an exception which is mentioned below.
• Use the word AND to find two words that are close together. For example, type moran AND fortin to find documents that have both names anywhere within the document.
• You can further refine this method by using the word NEAR. Typing in vests NEAR moran will return documents where vests is within 50 words of moran.
• You can use OR to find similar words within documents. For example, dogs OR puppies will return documents with either word, but not necessarily both.
  You can limit your search by using AND NOT. Typing in surfing AND NOT internet will return documents related to the sport and not the Web.
• Here's the exception we mentioned earlier about using quotes ("...") around phrases. You have to use quotes if you want to use AND, OR, NOT or NEAR literally. Typing "cats and dogs" will get you documents with the phrase cats and dogs. If you don't use the quotes, you'll retrieve documents that contain both words anywhere in the document. 
• You can use a single asterisk (*) to look for words that begin with the same letters. For example, typing key* will find documents with key, keying, keyhole, keyboard, etc.

How to make a smart search of the entire web
To learn more, of for advanced searches visit the following pages at Yahoo!

• Yahoo! Search Basics (How to use Yahoo! search, How Yahoo! Search Works, and Tips for Better Searching)
• Advanced search options (search methods, search area, new listings within ..., and results displayed)