Definitions for "Broaden"
To increase the number of results in a search. The Boolean operator "or" will broaden your search to find more references.
To alter a search in order to retrieve more references. Using the Boolean Operator "or" broadens a search.
extend in scope or range or area; "The law was extended to all citizens"; "widen the range of applications"; "broaden your horizon"; "Extend your backyard"
Keywords:  diversified, expand, spread, vary, risk
vary in order to spread risk or to expand; "The company diversified"