Perhaps you should try some spelling variations:
hanh trinh » canh tranh, hanh chinh
tieu sach » chieu sach, dien sach, te sach
trinh cua » tinh cua, trinh luat, trinh quan
cua huong » cua phuong, cua thuong, cua truong
cong tan » cong tac, cong thanh, cong ty
cong san » cong tac
tran cau » tran chau, toan cau, ran cau

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

• Performing a fuzzy search may retrieve terms with similar spellings: theo tieu sach - hanh trinh cua huong ((cong tan) or (cong san)) tran cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo tieu sach - hanh trinh cua huong ((cong tan) OR (cong san)) tran cau*.