Get exactly what you want: Using quotation marks (" ") around the search terms gives exact matches. For instance "Eligible Guarantors" will bring up all articles relating to those exact words.
Trim the results: Using the minus sign (-) in front of words you don't want will trim results containing that word. For instance Divorce -Custody will bring up all articles concerning divorce that do not contain the word custody.
Add common words: Using the plus sign (+) in front of a word will ensure it occurs in the results. The search will trim out common words like "the" "and" and "or". To compel it to search for common words you can place a plus sign in front of that word. +The Constitution will bring up results containing both The and Constitution.
Synonym Search: Using the tilde sign (~) in front of a word will search for synonyms of that word. For instance ~Children will bring up all articles concerning kids, child, offspring, dependants etc.
Find one or the other: Using OR in capital letters will search for documents with one word or the other. For instance Divorce Grounds OR Custody will find all articles with the words "divorce grounds" or "divorce custody". OR applies to the two words it comes between. Divorce OR Grounds Custody will apply OR to divorce and Grounds.
Fill in the blank: Using an asterisk (*) will indicate to the search engine to fill in the blank. For instance Joyriding is * will return all articles that contain the phrase "Joyriding is" and any word after. The * represents a wild card.