Perhaps you should try some spelling variations:
thieu khang » chieu khong, thieu quang
chieu xanh » chieu sach, chieu sang, chieu tinh
thanh tran » thanh trang, thanh toan, thanh tra
van nhung » van nhuong, va nhung, van hung
trung dai » truong dai, truong dao, trung tam
tran van » luan van
tung dan » dung dan, huong dan, dung dat
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 khang) or (chieu xanh)) - thanh tran van nhung ((tung dan) or (trung dai)) toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((thieu khang) OR (chieu xanh)) - thanh tran van nhung ((tung dan) OR (trung dai)) toan cau.
• Adding a wildcard symbol may retrieve word variants: hoc ((thieu khang) or (chieu xanh)) - thanh tran van nhung ((tung dan) or (trung dai)) toan cau*.