Perhaps you should try some spelling variations:
lang yanling » wang yanling, wang yangming, zhang yunling
yanling wang » mankind wang
der tests » des tests, der trusts, user tests
der test » der text, per test, der texte
kit song » kim song, art song, jie song
cong van » congo can, duong van, cong sun
wing sun » liang sun, cong sun, nina sun

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

• Performing a fuzzy search may retrieve terms with similar spellings: lang yanling wang ((der test) OR (der tests)) kit song ((cong van) or (wing sun)) ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: lang yanling wang ((der test) OR (der tests)) kit song ((cong van) OR (wing sun)) ;.
• The words AND, OR and NOT may confuse the search; try adding quotes: "lang yanling wang ((der test) OR (der tests)) kit song ((cong van) or (wing sun)) ;".
• Adding a wildcard symbol may retrieve word variants: lang yanling wang ((der test) OR (der tests)) kit song ((cong van) or (wing sun)) ;*.