Perhaps you should try some spelling variations:
hanh trinh » canh tranh, hanh chinh
tran chau » tranh chap, tran huu
theo chu » theo chieu, cho chu, chao chu
chu sach » cau sach, thu sach, chieu sach
trinh va » trinh van, trinh vat, trinh ve
cong tan » cong tac, cong thanh, cong ty
cong san » cong tac
tran cao » toan cao, trang cho, tranh cac
va hang » van hang, va nang, va lang

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 - hanh trinh va hang ((cong tan) OR (cong san)) ((tran cao) or (tran chau))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo chu sach - hanh trinh va hang ((cong tan) OR (cong san)) ((tran cao) OR (tran chau)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo chu sach - hanh trinh va hang ((cong tan) OR (cong san)) ((tran cao) or (tran chau))".
• Adding a wildcard symbol may retrieve word variants: theo chu sach - hanh trinh va hang ((cong tan) OR (cong san)) ((tran cao) or (tran chau))*.