Perhaps you should try some spelling variations:
theo chieu » theo tieu, ho chieu, theo chu
duong cong » dung cong, luong cong, duong trong
cua duong » cua dong, cua huong, qua duong
nhan tai » hang tai, van tai, toan tai
cong van » cong vang, cong san, song van
van toan » van tuan, van tan, van thanh
toan ban » van ban
co hieu » doc hieu
tai cua » thai cua, tai cuc, tri cua

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) or (cao hieu))) or (theo chieu)) lang - nhan tai cua duong cong van toan ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((((co hieu) OR (cao hieu))) OR (theo chieu)) lang - nhan tai cua duong cong van toan ban.
• Adding a wildcard symbol may retrieve word variants: ((((co hieu) or (cao hieu))) or (theo chieu)) lang - nhan tai cua duong cong van toan ban*.