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Basic Search Facts

  In making the subject headings, terms and query, try to think of
      Synonyms
      Variant Spellings
      Plural and singular
      Broader and narrower.
      Homonyms,
      Acronyms.
  Search is always case insensitive.
  Search operators are case sensitive:
  Generally, all the words you put in the query will be used.
  Words that are commonly used, like 'the' 'a 'which' `when' 'for' `of 'and alike are usually ignored (these are called stop words).  A search engine is not a human, it is a program that matches the words you give to pages on the web. 

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