Perhaps you should try some spelling variations:
thieu sach » chieu sach, thien hach, hieu cach
hanh trong » hanh trang, anh trong, hinh trong
hoc thieu » toc thieu, hoc hien
cac hang » cac dang, cac bang, cac lang
cong tac » cong ty
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.

• Performing a fuzzy search may retrieve terms with similar spellings: hoc thieu sach - hanh trong cac hang ((cong san) or (cong tac)) ((toan cau) or (toan ban))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thieu sach - hanh trong cac hang ((cong san) OR (cong tac)) ((toan cau) OR (toan ban)).
• Adding a wildcard symbol may retrieve word variants: hoc thieu sach - hanh trong cac hang ((cong san) or (cong tac)) ((toan cau) or (toan ban))*.