Perhaps you should try some spelling variations:
thieu sang » chieu sang, thieu khang, thieu quang
thinh dung » trinh dung, tinh dung, thanh dung
dang cong » dung cong
dung dat » dung va, dung tai
dat dang » da dang, dat hang, dai dang
cong tan » cong tac, cong san, cong thanh
phan lap » phan dau

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

• Performing a fuzzy search may retrieve terms with similar spellings: toc thieu sang - thinh dung dat dang cong tan ((phan tu) or (phan lap))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc thieu sang - thinh dung dat dang cong tan ((phan tu) OR (phan lap))*.