Perhaps you should try some spelling variations:
tong cong » trong cong, cong cong, dung cong
theo chu » theo chieu, cho chu, chao chu
chu sach » cau sach, thu sach, chieu sach
cong san » cong tac
toan ban » van ban
cong va » cong ha, cong tac, luong va
dong va » dung va, dong ha, luong va

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

• Performing a fuzzy search may retrieve terms with similar spellings: theo chu sach - nganh ((cong va) OR (dong va)) tong cong san ((toan tap) or (toan ban))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo chu sach - nganh ((cong va) OR (dong va)) tong cong san ((toan tap) OR (toan ban)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo chu sach - nganh ((cong va) OR (dong va)) tong cong san ((toan tap) or (toan ban))".
• Adding a wildcard symbol may retrieve word variants: theo chu sach - nganh ((cong va) OR (dong va)) tong cong san ((toan tap) or (toan ban))*.