Perhaps you should try some spelling variations:
tieu sach » chieu sach, dien sach, te sach
hanh dung » thanh dung, anh dung, hanh dong
tai hang » thai hang, tai lang, tai hung
thi hang » thi hanh, thi nang, thi hong
cong tan » cong tac, cong san, cong thanh
toan cao » toan tap
toan ban » van ban

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