Perhaps you should try some spelling variations:
hanh trinh » canh tranh, hanh chinh
hoc thieu » toc thieu, hoc hien
trinh cua » tinh cua, trinh luat, trinh quan
hang cong » dang cong, hang nong, bang cong
ho chieu » theo chieu, doi chieu, mot chieu
cua hang » cua dang, cua nhung, cua cong
tap toan » tap quan, bai toan
tap doan » tap quan

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) OR (ho chieu)) sach - hanh trinh cua hang cong ((tap toan) OR (tap doan)) cao~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((hoc thieu) or (ho chieu)) sach - hanh trinh cua hang cong ((tap toan) OR (tap doan)) cao~".
• Adding a wildcard symbol may retrieve word variants: ((hoc thieu) or (ho chieu)) sach - hanh trinh cua hang cong ((tap toan) OR (tap doan)) cao*.