Perhaps you should try some spelling variations:
thieu sach » chieu sach, thien hach, hieu cach
hanh trinh » canh tranh, hanh chinh
hoc thieu » toc thieu, hoc hien
trinh cua » tinh cua, trinh luat, trinh quan
ban cong » bang cong, van cong, phan cong
san toan » manh toan, xuan toan, san doanh
dan toan » dan than, manh toan, xuan toan
van toan » van tuan, van tan, van thanh

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 trinh cua ban cong ((san toan) OR (((dan toan) OR (van toan)))) cau~.
• Adding a wildcard symbol may retrieve word variants: hoc thieu sach - hanh trinh cua ban cong ((san toan) or (((dan toan) or (van toan)))) cau*.