Perhaps you should try some spelling variations:
luan trong » quan trong, luat trong, luan tuong
trinh toan » tinh toan, thanh toan, trinh quan
doi chieu » doc hieu, doi chi, mot chieu
hanh mang » nhanh mang, hanh trang, nhanh lang
mang luan » tang luan, hang luan, bang luan
trinh han » trinh quan
ho chieu » theo chieu, hoc thieu, mot chieu

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: ((ho chieu) OR (doi chieu)) sach - hanh mang luan trong cong ((trinh toan) OR (trinh han)) ban~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((ho chieu) OR (doi chieu)) sach - hanh mang luan trong cong ((trinh toan) or (trinh han)) ban~".
• Adding a wildcard symbol may retrieve word variants: ((ho chieu) OR (doi chieu)) sach - hanh mang luan trong cong ((trinh toan) or (trinh han)) ban*.