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The search is not case-sensitive.
e.g. traffic, TRAFFIC, Traffic all return the same results.

Multiple words need to be in quotes (") to be considered a phrase.
e.g. "rail transportation"

Use and between search words to find terms that have all the search words but not necessarily next to each other. This is the default search type if no words are in quotes.
e.g. rail and transportation

Use or between search words to find terms that have one or all of the search words.
e.g. rail or transportation

Use not between search words to find terms that do not contain the search word after not.
e.g. transportation not air

The search supports wild card *, which replaces * with any letter or any number of letters.
e.g. For transpo*, terms with transportation and transport are some that would be returned.