Parentheses Each online search service has its own system for determining in what order search statments should be processed. Some services process the ANDs first, others process the ORs first. Parentheses force search engines to combine the elements of a search statement the way you want them connected. When using a complex search statement, it is always best to use parentheses. In the search statement below, the parentheses instruct search engine to combine hillary within two words of clinton first.
Truncation is used to search the root of the word without regard to what suffix is used.
Wildcards are used when varient spellings could be found or to specify the maximum number of characters desired when truncating.