AND, OR, NOT allow you to limit or expand searches depending on your needs.
Beethoven AND reception
piano OR klavier
Ludwig NOT Johann (Beethoven's father)
An important strategy to employ when searching phrasal concepts or conducting known-item searches for titles:
When pairing two or more keywords with another keyword, it is helfpul to "nest" the former terms within a larger Boolean search.
Truncation and Wildcards:
Most catalogs and databases enable users to search variations of keywords by using truncation (*) or wildcard (e.g., ?, $, !) symbols.