Perhaps you should try some spelling variations:
thanh tung » thanh cong
phan hieu » van hieu, phan kien, gian hieu
cong cong » cong dong, trong cong, dung cong
nho hieu » nha hieu, nho sieu, nhu hieu
tung cua » trung cua, tuong cua, dung cua
cong tac » cong ty
tac toan » tap toan, tam toan, hach toan
toan tap » toan ban
ho hieu » ho chieu, hoi hieu, co 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) or (((nho hieu) or (phan hieu)))) quang - thanh tung cua cong cong tac toan tap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((ho hieu) OR (((nho hieu) OR (phan hieu)))) quang - thanh tung cua cong cong tac toan tap.
• Adding a wildcard symbol may retrieve word variants: ((ho hieu) or (((nho hieu) or (phan hieu)))) quang - thanh tung cua cong cong tac toan tap*.