In the search box, type in the proximity connector w/# where two terms should appear near each other but word order is not specified.
market w/5 share will retrieve articles where the word "market" is no more than 5 words away from the word "share," as in:
Note: In Business Source Complete, type: market n5 share
In Factiva, type: market adj5 share
Factiva also has a subject index term market share