Perhaps you should try some spelling variations:
thuat nhung » thuat hung, thuat chung, thuat chuong
luat nhung » luat chung, luat thuong, cua nhung
hieu cach » hieu cac, chieu sach, hieu ca
hoc hieu » hoc thieu, hoc hien, doc hieu
dan toan » van toan, dan than, manh toan
ban than » ban thanh, van thanh, ban hang

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc hieu cach - canh tranh ((luat nhung) OR (thuat nhung)) cong ((dan toan) or (ban than)) cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc hieu cach - canh tranh ((luat nhung) OR (thuat nhung)) cong ((dan toan) OR (ban than)) cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc hieu cach - canh tranh ((luat nhung) OR (thuat nhung)) cong ((dan toan) or (ban than)) cau".
• Adding a wildcard symbol may retrieve word variants: hoc hieu cach - canh tranh ((luat nhung) OR (thuat nhung)) cong ((dan toan) or (ban than)) cau*.