Perhaps you should try some spelling variations:
tieu sach » chieu sach, dien sach, te sach
hanh dung » thanh dung, hanh dong, manh dung
hang cong » dang cong, hang nong, bang cong
anh dung » anh dong, anh huong, sach dung
tai hang » thai hang, thi hang, tai lang
cong tan » cong tac, cong san, cong thanh
toan cau » toan cao, toan tap, toan tai
toan ban » van ban

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

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