Use WILDCARDS or TRUNCATION (i.e., shortening a word to its root or base form using a designated symbol) for words that might have more than one significant form, OR for terms that might have alternative spellings.
First, type as much of the word that you KNOW is correct.
NOTE: A minimum of three characters must precede any of the following symbols.
Use an asterisk (*) to indicate any number of letters.
Use a pound sign (aka hashtag, octothorpe; #) to represent a single character.
Use a question mark (?) to match missing (zero) or up to nine characters.
encyclop?dia retrieves encyclopedia and encyclopaedia
res?4tion retrieves respiration, restoration, reservation, etc.