Perhaps you should try some spelling variations:
hanh trinh » canh tranh, hanh chinh
trinh xuan » trinh quan, trinh luan, trinh luat
nhan xuong » phan xuong, nhan tuong, khac xuong
doi chieu » doc hieu, doi chi, mot chieu
xuan nhan » xuan thanh, xuan toan, van nhan
ho chieu » theo chieu, hoc thieu, mot chieu
dan toan » van toan, manh toan, xuan toan
dan than » dan chan, ban than, van than

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 (doi chieu)) sach - hanh trinh xuan nhan xuong ((dan toan) OR (dan than)) cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((ho chieu) OR (doi chieu)) sach - hanh trinh xuan nhan xuong ((dan toan) OR (dan than)) cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((ho chieu) or (doi chieu)) sach - hanh trinh xuan nhan xuong ((dan toan) OR (dan than)) cau".
• Adding a wildcard symbol may retrieve word variants: ((ho chieu) or (doi chieu)) sach - hanh trinh xuan nhan xuong ((dan toan) OR (dan than)) cau*.