Perhaps you should try some spelling variations:
thanh trung » thanh tung
trung cua » truong cua, trung tuan, trung cap
hoc sang » hoc bang, hoc tang, hoc song
hoc hang » hoc hanh, hoc bang, hoc tang
cua dong » chua dong, cua cong, cua dang
cong tac » cong ty
toan cao » toan ban, toan tap

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((hoc sang) or (hoc hang)) tac - thanh trung cua dong ((cong san) or (cong tac)) toan cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((hoc sang) OR (hoc hang)) tac - thanh trung cua dong ((cong san) OR (cong tac)) toan cao.
• Adding a wildcard symbol may retrieve word variants: ((hoc sang) or (hoc hang)) tac - thanh trung cua dong ((cong san) or (cong tac)) toan cao*.