Perhaps you should try some spelling variations:
nhung huong » nhung phuong, nhung tuong, nhung cong
theo chieu » theo tieu, theo chu, thi chieu
hanh trinh » canh tranh, hanh chinh
ho chieu » hoc thieu, doi chieu, mot chieu
trinh va » trinh van, trinh vat, trinh ve
dan toan » van toan, dan than, manh toan
toan cau » toan cao, toan ban, toan tap

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 (theo chieu)) sach - hanh trinh va nhung huong dan toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((ho chieu) OR (theo chieu)) sach - hanh trinh va nhung huong dan toan cau.
• Adding a wildcard symbol may retrieve word variants: ((ho chieu) or (theo chieu)) sach - hanh trinh va nhung huong dan toan cau*.