Perhaps you should try some spelling variations:
pena literatura » pela literatura, na literatura, lengua literatura
daring soldier » during soldier, marching soldier, danish soldier
en literatura » e literatura, en litterature, la literatura
tests daring » tests during, tests sharing, tests making

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: tests daring soldier _ filosofia ((en literatura) OR (pena literatura)).
• Adding a wildcard symbol may retrieve word variants: tests daring soldier _ filosofia ((en literatura) or (pena literatura))*.