Perhaps you should try some spelling variations:
thieu khang » chieu khong, thieu quang
thieu sang » chieu sang, thieu quang, hieu lang
chieu sach » chinh sach, chiet tach, chieu sang
thanh tran » thanh trang, thanh toan, thanh tra
tran thanh » ban thanh, van thanh, quan thanh
thanh dung » thanh duong, thanh tung, thanh hung
dung cong » dung trong
cong tan » cong tac, cong san, cong thanh
tan toan » tan tran, tap toan, van toan
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) OR (thieu khang))) or (chieu sach)) - thanh tran thanh dung cong tan toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((((thieu sang) OR (thieu khang))) OR (chieu sach)) - thanh tran thanh dung cong tan toan cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((((thieu sang) OR (thieu khang))) or (chieu sach)) - thanh tran thanh dung cong tan toan cau".
• Adding a wildcard symbol may retrieve word variants: hoc ((((thieu sang) OR (thieu khang))) or (chieu sach)) - thanh tran thanh dung cong tan toan cau*.