Perhaps you should try some spelling variations:
lang yanling » wang yanling, wang yangming, zhang yunling
yanling yang » yang yang, ying yang
song rong » song chong, hong song, song bing
der test » der tests, der text, der texte
per test » der tests, per cent, asr test
kit song » kim song, art song, jie song
rong yu » hong yu, rong su, wong yue

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 yang ((der test) OR (per test)) kit song rong yu ;~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "lang yanling yang ((der test) OR (per test)) kit song rong yu ;".
• Adding a wildcard symbol may retrieve word variants: lang yanling yang ((der test) OR (per test)) kit song rong yu ;*.