Perhaps you should try some spelling variations:
testing burning » testing running, testing building, testing learning
burning studied » burning studies, being studied, burning study
de literatura » de litterature, la literatura, y literatura
e literatura » y literatura, e literatur, a literatura
studied la » studied law, studied plan, studied via

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: "testing burning studied la filosofia ((e literatura) OR (de literatura))*".