Perhaps you should try some spelling variations:
thieu sang » chieu sang, thieu khang, thieu quang
thanh tung » thanh cong
nhung cong » thong cong, hang cong, nhung don
hoc thieu » toc thieu, hoc hien
tung quan » tuong quan, trung quan, dung quan
dung cong » dung trong
than cap » thanh lap, thanh cac, than cua
khan cap » khan ap, khoan cam, phan cac

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc thieu sang - thanh tung quan ((nhung cong) OR (dung cong)) ban ((than cap) or (khan cap))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thieu sang - thanh tung quan ((nhung cong) OR (dung cong)) ban ((than cap) OR (khan cap))*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc thieu sang - thanh tung quan ((nhung cong) OR (dung cong)) ban ((than cap) or (khan cap))*".