Perhaps you should try some spelling variations:
theo chieu » theo tieu, ho chieu, theo chu
chieu tinh » trieu tinh, lieu tinh, chau tinh
trung cua » truong cua, trung tuan, trung cap
tong cong » trong cong, cong cong, dung cong
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 - thanh ((trung cua) or (trung tam)) tong cong tac khan cap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo chieu tinh - thanh ((trung cua) OR (trung tam)) tong cong tac khan cap.
• Adding a wildcard symbol may retrieve word variants: theo chieu tinh - thanh ((trung cua) or (trung tam)) tong cong tac khan cap*.