omni and subject headings
try using subject headings in your search instead of keywords. subject headings help you find relevant items on the same topic. searching by subject heading can often yield better results than searching by keyword.
in omni's advanced search, change the pull-down box on the left from any field to subject.
then change material type to books & ebooks.
examples of subject headings:
harris, lawren
picasso, pablo, 1881-1973 - exhibitions
art, modern - 20th century
painting, french - 19th century
modernism (art)
indian art - canada