Perhaps you should try some spelling variations:
hieu sach » chieu sach, hieu cach, dien sach
quan tuan » quang tuan, quan luan, quan quan
tuan hung » tran hung, luan hung, tuan dung
hung cong » nhung cong, hung cuong, phung cong
doc hieu » toc thieu, hoc thieu, hoc hien
anh quan » anh tuan, ban quan, anh nhan
cong tac » cong ty
toan cau » toan ban, toan tap, toan tai
toan cao » toan ban, toan tap

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

• Performing a fuzzy search may retrieve terms with similar spellings: doc hieu sach - anh quan tuan hung cong tac ((toan cau) or (toan cao))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doc hieu sach - anh quan tuan hung cong tac ((toan cau) OR (toan cao)).
• Adding a wildcard symbol may retrieve word variants: doc hieu sach - anh quan tuan hung cong tac ((toan cau) or (toan cao))*.