Perhaps you should try some spelling variations:
thieu sach » chieu sach, thien hach, hieu cach
hanh trang » thanh trung, hanh trinh, minh trang
hoc thieu » toc thieu, hoc hien
cua hang » cua dang, cua nhung, cua ban
cong tac » cong ty
tac toan » tap toan, tam toan, hach toan
toan cau » toan cao, toan ban, toan tap

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: hoc thieu sach - ((hanh trang) OR (canh tranh)) ((cua hang) OR (cua cong)) cong tac toan cau~.
• Adding a wildcard symbol may retrieve word variants: hoc thieu sach - ((hanh trang) or (canh tranh)) ((cua hang) or (cua cong)) cong tac toan cau*.