Perhaps you should try some spelling variations:
thieu sang » chieu sang, thieu khang, thieu quang
thanh tung » thanh cong
nhung cong » dung cong, hang cong, nhung don
thong cong » trong cong, tong cong, thong thong
hoc thieu » toc thieu, hoc hien
tung cua » trung cua, tuong cua, dung cua
than cap » khan cap, thanh lap, thanh cac
toan cau » toan cao, toan ban, toan tap

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 cua ((nhung cong) or (thong cong)) dan ((than cap) or (toan cau))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thieu sang - thanh tung cua ((nhung cong) OR (thong cong)) dan ((than cap) OR (toan cau)).
• Adding a wildcard symbol may retrieve word variants: hoc thieu sang - thanh tung cua ((nhung cong) or (thong cong)) dan ((than cap) or (toan cau))*.