Perhaps you should try some spelling variations:
lang ying » liang ying, huang ying, zhang ying
ying yang » yang yang, yin yang, ying chang
der tests » des tests, der trusts, user tests
jeong 情 » jeong _, jeongui 情, jeong mi
der test » der text, per test, der texte
kit song » kim song, art song, jie song
jeong su » jeong _, jeong mi, rong su

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

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