Perhaps you should try some spelling variations:
thanh truong » thanh trung, thanh thuong, thanh tung
hieu quang » thieu quang, hieu quan, hieu qua
luong cong » dung cong, trong cong, cong cong
truong va » truong dai, truong cao, truong dao
tong cong » trong cong, cong cong, dung cong
phan cac » nhan cach, phan dau, phan lap
ho hieu » ho chieu, hoi hieu, nho hieu

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

• Performing a fuzzy search may retrieve terms with similar spellings: ho hieu quang - thanh truong va ((luong cong) or (tong cong)) dan ((phan tu) or (phan cac))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho hieu quang - thanh truong va ((luong cong) OR (tong cong)) dan ((phan tu) OR (phan cac)).
• Adding a wildcard symbol may retrieve word variants: ho hieu quang - thanh truong va ((luong cong) or (tong cong)) dan ((phan tu) or (phan cac))*.