Perhaps you should try some spelling variations:
nhung xuong » nhung huong, nhung tuong, nhung phuong
chai tinh » chau tinh, thai tinh, cham tinh
tranh cua » doanh cua, manh cua
cua nhung » va nhung
xuong san » xuong song, cong san, dong san
chi tinh » chi minh, chi binh, cha tinh
san van » tan van, luan van, tran van

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

• Performing a fuzzy search may retrieve terms with similar spellings: doi ((chi tinh) OR (chai tinh)) - canh tranh cua nhung xuong san van ban~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doi ((chi tinh) OR (chai tinh)) - canh tranh cua nhung xuong san van ban".
• Adding a wildcard symbol may retrieve word variants: doi ((chi tinh) OR (chai tinh)) - canh tranh cua nhung xuong san van ban*.