Perhaps you should try some spelling variations:
sales studien » als studien, sals studies, gilles studien
filosofia da » filosofia del, filosofia e, filosofia della
filosofia de » filosofia del
loss sales » lost sales, losers sales, loss samples
studien es » studien aus, studien bei, studien ein

You may be able to get more results by adjusting your search query.

• The words AND, OR and NOT may confuse the search; try adding quotes: "loss sales studien es ((filosofia da) OR (filosofia de)) literatura*".