Perhaps you should try some spelling variations:
thanh trung » thanh tung
chieu tinh » trieu tinh, lieu tinh, chau tinh
trung ca » trung cap, truong ca, trung cua
ca trong » cay trong, cad trong, co trong
cong tac » cong ty
tac khan » tac nhan, cac khoan, tac chuan
khan cap » khan ap, than cap, khoan cam

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

• Performing a fuzzy search may retrieve terms with similar spellings: theo ((chieu tinh) or (diep tinh)) - thanh trung ca trong cong tac khan cap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo ((chieu tinh) OR (diep tinh)) - thanh trung ca trong cong tac khan cap.
• Adding a wildcard symbol may retrieve word variants: theo ((chieu tinh) or (diep tinh)) - thanh trung ca trong cong tac khan cap*.