Perhaps you should try some spelling variations:
thanh trung » thanh tung
luong cong » dung cong, trong cong, cong cong
hieu lang » chieu sang, hieu quang, nhieu tang
tong cong » trong cong, cong cong, dung cong
trung va » truong va, trang va, trung ha
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 lang - thanh trung 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 lang - thanh trung va ((luong cong) OR (tong cong)) dan ((phan tu) OR (phan cac)).
• Adding a wildcard symbol may retrieve word variants: ho hieu lang - thanh trung va ((luong cong) or (tong cong)) dan ((phan tu) or (phan cac))*.