Perhaps you should try some spelling variations:
trung thanh » truong thanh
nhung cong » dung cong, thong cong, hang cong
trung cua » truong cua, trung tuan, trung cap
cua dang » cua cong
cong tac » cong ty
tac hang » tac vang, bac thang, tac chong
hang tai » hang va, dung tai

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

• Performing a fuzzy search may retrieve terms with similar spellings: cheo ((cua dang) OR (cua ban)) - thanh ((trung cua) or (trung thanh)) nhung cong tac hang tai~.
• If you are trying to use Boolean operators, they must be ALL CAPS: cheo ((cua dang) OR (cua ban)) - thanh ((trung cua) OR (trung thanh)) nhung cong tac hang tai.
• The words AND, OR and NOT may confuse the search; try adding quotes: "cheo ((cua dang) OR (cua ban)) - thanh ((trung cua) or (trung thanh)) nhung cong tac hang tai".
• Adding a wildcard symbol may retrieve word variants: cheo ((cua dang) OR (cua ban)) - thanh ((trung cua) or (trung thanh)) nhung cong tac hang tai*.