Perhaps you should try some spelling variations:
thieu sang » chieu sang, thieu khang, thieu quang
thanh tinh » thanh binh, nhanh tinh, than kinh
hoang manh » hoang minh, hoang anh, hoang xanh
thong cong » trong cong, tong cong, thong thong
hoc thieu » toc thieu, hoc hien
cua thong » cua thuong, cua khong, cua tong
cong tac » cong ty
tac tran » tan tran, tac trai, tac tren
tran cao » toan cao, tran chau, trang cho

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 tinh) or (hoang manh)) cua thong cong tac tran cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thieu sang - ((thanh tinh) OR (hoang manh)) cua thong cong tac tran cao.
• Adding a wildcard symbol may retrieve word variants: hoc thieu sang - ((thanh tinh) or (hoang manh)) cua thong cong tac tran cao*.