Here are some basic search tricks for the catalogues and all databases:
e.g. histor? will retrieve catalogue records containing the words history, histories, historical, etc.
e.g. "New Brunswick" will retrieve only catalogue records containing the entire phrase New Brunswick
(), AND, OR, NOT
e.g. history AND (Canada OR "United States") will retrieve catalogue records containing the word history plus either Canada OR the phrase United States. Remember: AND will make your search narrower and OR will make your search wider.