Perhaps you should try some spelling variations:
thieu sang » chieu sang, thieu khang, thieu quang
thanh tran » thanh trang, thanh toan, thanh tra
tuan thong » tran thong, tuan phong, xuan thong
thanh chau » thanh cha, thanh cham, thanh chu
hoc thieu » toc thieu, hoc hien
cong tan » cong tac, cong san, cong thanh
than cap » khan cap, thanh lap, thanh 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 tran ((tuan thong) OR (toan thong)) cong tan ((thanh chau) or (than cap))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thieu sang - thanh tran ((tuan thong) OR (toan thong)) cong tan ((thanh chau) OR (than cap))*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc thieu sang - thanh tran ((tuan thong) OR (toan thong)) cong tan ((thanh chau) or (than cap))*".