Perhaps you should try some spelling variations:
hoan vuong » hoang vuong, hoang duong, hoang tuong
doi chieu » doc hieu, doi chi, mot chieu
tranh van » tran van, trinh van, thanh van
manh toan » thanh toan, anh tuan, tinh toan
ho chieu » theo chieu, hoc thieu, mot chieu
van hoan » van hoang, van hoa, van toan
dan toan » van toan, dan than, xuan toan

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((doi chieu) or (ho chieu)) sach - canh tranh van hoan vuong ((dan toan) or (manh toan)) cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((doi chieu) OR (ho chieu)) sach - canh tranh van hoan vuong ((dan toan) OR (manh toan)) cau.
• Adding a wildcard symbol may retrieve word variants: ((doi chieu) or (ho chieu)) sach - canh tranh van hoan vuong ((dan toan) or (manh toan)) cau*.