Exact Phrase:

Literal search
Not case-sensitive, capitalization is ignored
Results page is organized by number of hits per document.
Examples: weingarten rights

All Words:

Words can be in any order.
Usually returns a smaller number of hits.
Examples: DSHS employee appeal

Boolean Search:

AND, OR, NEAR, and AND NOT operators are supported.
Use quotation marks for literal strings.
Examples: collective bargaining AND ecology