Perhaps you should try some spelling variations:
del literatura » de literatura, pela literatura, da literatura
test suitable » best suitable, most suitable, notes suitable
tests table » test tables, results table, lists tables
a filosofia » la filosofia, e filosofia, di filosofia
student a » student _

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: "((tests table) OR (test suitable)) student a filosofia del literatura".
• Adding a wildcard symbol may retrieve word variants: ((tests table) OR (test suitable)) student a filosofia del literatura*.