Perhaps you should try some spelling variations:
thinh nang » thich nang, thinh lang, tinh nang
dung cong » dung trong
nang quan » ban quan, nang suat
thon lang » nhon lang, tho lang, thong mang
cong van » cong vang, cong san, song van
van hieu » cao hieu
hieu tra » dieu tra, hiep tran, chieu tro
quan dat » quan sat, qua dat, quan dac
dat thon » dat thoi, dat trong, dat thanh
tin » tinh

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

• Performing a fuzzy search may retrieve terms with similar spellings: (( tin dung cong van hieu tra ) or ( thinh nang quan dat thon lang ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( tin dung cong van hieu tra ) OR ( thinh nang quan dat thon lang ))*.