Perhaps you should try some spelling variations:
hanh trinh » canh tranh, hanh chinh
trinh toan » thanh toan, trinh han, trinh quan
toan nhung » toan chung, toan khung, doanh nhung
nhung cong » dung cong, thong cong, hang cong
mot chieu » doi chieu
ho chieu » theo chieu, hoc thieu, doi chieu
dan toan » van toan, dan than, manh toan

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: ((ho chieu) or (mot chieu)) sach - hanh trinh toan nhung cong ((dan toan) or (tinh toan)) tap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((ho chieu) OR (mot chieu)) sach - hanh trinh toan nhung cong ((dan toan) OR (tinh toan)) tap.
• Adding a wildcard symbol may retrieve word variants: ((ho chieu) or (mot chieu)) sach - hanh trinh toan nhung cong ((dan toan) or (tinh toan)) tap*.