What means "reduced" in the result set?

TheBookSearch is a search engine for books. TheBookSearch shows all available books form every bookseller.

If one bookseller delivers more than 150 offers for your book we show only the first 150 offers. If all sellers together deliver more than 1000 offers, we show only the first 1000. In this cases we display "reduced" on the results page.

This means for you that you should refine your search.