Perhaps you should try some spelling variations:
rules studium » duales studium, rules studying, furs studium
e literature » e literatur, life literature, norse literature
test rules » best rules, test rule, trust rules
studium la » studium a, studium als, studium das
prose » prove

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

• If you are trying to use Boolean operators, they must be ALL CAPS: test rules studium la filosofia ((e literature) OR (prose literature)).
• Adding a wildcard symbol may retrieve word variants: test rules studium la filosofia ((e literature) or (prose literature))*.