Perhaps you should try some spelling variations:
life literature » polite literature
duale studien » duale studium, scale studien, duales studium
de filosofia » e filosofia, di filosofia, la filosofia
test duale » test double, test delle, test orale
studien de » studien der, studien die, studien des
prose » prove

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: "test duale studien de filosofia ((life literature) OR (prose literature))*".