Perhaps you should try some spelling variations:
thanh trung » thanh tung
cong thanh » dong thanh, cong trinh, cong tan
hieu tinh » chieu tinh, lieu tinh, hieu binh
kieu tinh » lieu tinh, trieu tinh, diep tinh
trung cua » truong cua, trung tuan, trung cap
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: co ((hieu tinh) or (kieu tinh)) - thanh trung cua dong ((cong thanh) or (cong tac)) toan cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: co ((hieu tinh) OR (kieu tinh)) - thanh trung cua dong ((cong thanh) OR (cong tac)) toan cao.
• Adding a wildcard symbol may retrieve word variants: co ((hieu tinh) or (kieu tinh)) - thanh trung cua dong ((cong thanh) or (cong tac)) toan cao*.