Perhaps you should try some spelling variations:
thieu sang » chieu sang, thieu khang, thieu quang
thanh tung » thanh cong
hoc thieu » toc thieu, hoc hien
tung cua » trung cua, tuong cua, dung cua
cua dong » chua dong, cua cong, cua dang
cong tan » cong san, cong thanh, cong ty
cong tac » cong ty
toan ban » van ban

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 dong ((cong tan) OR (cong tac)) ((toan ban) or (toan tap))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thieu sang - thanh tung cua dong ((cong tan) OR (cong tac)) ((toan ban) OR (toan tap)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc thieu sang - thanh tung cua dong ((cong tan) OR (cong tac)) ((toan ban) or (toan tap))".
• Adding a wildcard symbol may retrieve word variants: hoc thieu sang - thanh tung cua dong ((cong tan) OR (cong tac)) ((toan ban) or (toan tap))*.