Perhaps you should try some spelling variations:
thanh truong » thanh trung, thanh thuong, thanh tung
thieu quang » thien quan, trien quang, hieu quan
hieu quang » hieu quan, hieu qua, diep quang
truong cua » truong ca, truong quan, truong cao
cong thanh » dong thanh, cong trinh, cong tan
thanh khan » thanh phan, thanh nhan, thanh thanh
cua trong » cua truong, cua trung, qua trong
khan cap » khan ap, than cap, khoan cam

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: hoc ((hieu quang) or (thieu quang)) - thanh truong cua trong cong thanh khan cap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((hieu quang) OR (thieu quang)) - thanh truong cua trong cong thanh khan cap.
• Adding a wildcard symbol may retrieve word variants: hoc ((hieu quang) or (thieu quang)) - thanh truong cua trong cong thanh khan cap*.