Perhaps you should try some spelling variations:
thieu khang » thieu quang
chieu khong » chien chong, chu khong, chieu duong
tranh van » tran van, trinh van, thanh van
dang cong » dung cong
tranh va » trang va, trinh va, thanh va
cong tac » cong ty
tac phan » tac pham, tai phan, tac phat
phan dau » phan tu, hang 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 khang) OR (chieu khong)) - canh ((tranh va) or (tranh van)) dang cong tac phan dau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc ((thieu khang) OR (chieu khong)) - canh ((tranh va) OR (tranh van)) dang cong tac phan dau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "toc ((thieu khang) OR (chieu khong)) - canh ((tranh va) or (tranh van)) dang cong tac phan dau".
• Adding a wildcard symbol may retrieve word variants: toc ((thieu khang) OR (chieu khong)) - canh ((tranh va) or (tranh van)) dang cong tac phan dau*.