Perhaps you should try some spelling variations:
thanh trung » thanh tung
thieu sang » chieu sang, thieu khang, thieu quang
hieu lang » chieu sang, hieu quang, nhieu tang
tam nhung » tham nhung, cam nhung, nam nhung
cong lang » cong vang, cong luong, cong quang
cong san » cong tac
than cau » toan cau, phan cau, than cap

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 (hieu lang)) - thanh trung tam nhung ((cong san) or (cong lang)) than cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((thieu sang) OR (hieu lang)) - thanh trung tam nhung ((cong san) OR (cong lang)) than cau.
• Adding a wildcard symbol may retrieve word variants: hoc ((thieu sang) or (hieu lang)) - thanh trung tam nhung ((cong san) or (cong lang)) than cau*.