Perhaps you should try some spelling variations:
trung thanh » truong thanh
trung tuan » trung tam, tran tuan, truong thanh
lieu tinh » trieu tinh, bien tinh
dung cong » dung 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: co ((lieu tinh) OR (diep tinh)) - thanh ((trung tuan) or (trung thanh)) dung cong tac khan cap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: co ((lieu tinh) OR (diep tinh)) - thanh ((trung tuan) OR (trung thanh)) dung cong tac khan cap.
• The words AND, OR and NOT may confuse the search; try adding quotes: "co ((lieu tinh) OR (diep tinh)) - thanh ((trung tuan) or (trung thanh)) dung cong tac khan cap".
• Adding a wildcard symbol may retrieve word variants: co ((lieu tinh) OR (diep tinh)) - thanh ((trung tuan) or (trung thanh)) dung cong tac khan cap*.