Perhaps you should try some spelling variations:
thuong cong » thong cong, thuong con, thuong dong
thanh trung » thanh tung
theo chieu » theo tieu, ho chieu, theo chu
doi chieu » doc hieu, doi chi, ho chieu
trung va » truong va, trang va, trung ha
cong san » cong tac
than cap » khan cap, thanh lap, thanh cac
toan cao » toan ban, toan tap

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) OR (doi chieu)) sach - thanh trung va thuong cong san ((than cap) OR (toan cao))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((theo chieu) OR (doi chieu)) sach - thanh trung va thuong cong san ((than cap) OR (toan cao))".
• Adding a wildcard symbol may retrieve word variants: ((theo chieu) OR (doi chieu)) sach - thanh trung va thuong cong san ((than cap) OR (toan cao))*.