Perhaps you should try some spelling variations:
thanh trung » thanh tung
trong tac » trong cac, tuong tac, trong tan
theo yeu » theo tieu, thiet yeu, theo chu
yeu tinh » yeu tin, lieu tinh, kieu tinh
cua dang » cua cong, cua ban
qua dung » quang dung, su dung, qua song
tran cau » tran chau, toan cau, tra cau
ran cau » van cau, ban cau, can cau

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

• Performing a fuzzy search may retrieve terms with similar spellings: theo yeu tinh - thanh trung ((cua dang) or (qua dung)) trong tac ((tran cau) or (ran cau))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo yeu tinh - thanh trung ((cua dang) OR (qua dung)) trong tac ((tran cau) OR (ran cau)).
• Adding a wildcard symbol may retrieve word variants: theo yeu tinh - thanh trung ((cua dang) or (qua dung)) trong tac ((tran cau) or (ran cau))*.