Perhaps you should try some spelling variations:
thuong cong » thong cong, thuong con, thuong dong
theo chieu » ho chieu, theo chu, thi chieu
truong cao » truong dai
trung cap » trung tam
cong tac » cong ty
tac than » tac thanh, tam than, tac nhan
than tap » toan tap, han tap, phan 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 (theo tieu)) sach - hanh ((trung cap) OR (truong cao)) thuong cong tac than tap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((theo chieu) OR (theo tieu)) sach - hanh ((trung cap) OR (truong cao)) thuong cong tac than tap.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((theo chieu) or (theo tieu)) sach - hanh ((trung cap) OR (truong cao)) thuong cong tac than tap".
• Adding a wildcard symbol may retrieve word variants: ((theo chieu) or (theo tieu)) sach - hanh ((trung cap) OR (truong cao)) thuong cong tac than tap*.