Truncation is another method of broadening the search by locating all of the variant endings of a word. The symbol used can vary between databases, but most frequently it is an asterisk (*). To truncate, add the truncation symbol to the stem of the search term.
Elect* would retrieve electoral, election, electorate and any other variations of the word including elect.
If a search for presidential candidate does not retrieve enough results, try expanding the search by typing presidential candidate*
Instead of typing vote or votes or voter or voters, type vote*. This will also find anything else that starts with vote.
The truncation symbol can replace any number of letters. Be careful where you place it. In addition to the words listed above, elect* would also retrieve electronics, electrical and other unrelated words. To be more precise this search should be changed to electo* or electi*.