Perhaps you should try some spelling variations:
hanh tranh » canh tranh, hanh trinh, hanh trang
nhung bong » nhung cong, nhung bang, nhung chong
hieu sach » chieu sach, dien sach, hieu cac
hieu cach » hieu cac, chieu sach, hieu ca
tranh cua » doanh cua, manh cua
cua nhung » va nhung
van toan » van tan, van thanh, manh toan
van tuan » van quan, van ban, anh tuan

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

• Performing a fuzzy search may retrieve terms with similar spellings: doc ((hieu sach) OR (hieu cach)) - hanh tranh cua nhung bong ((van toan) or (van tuan)) cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doc ((hieu sach) OR (hieu cach)) - hanh tranh cua nhung bong ((van toan) OR (van tuan)) cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doc ((hieu sach) OR (hieu cach)) - hanh tranh cua nhung bong ((van toan) or (van tuan)) cau".
• Adding a wildcard symbol may retrieve word variants: doc ((hieu sach) OR (hieu cach)) - hanh tranh cua nhung bong ((van toan) or (van tuan)) cau*.