Perhaps you should try some spelling variations:
tranh luat » trinh luat, tranh luan, trinh luan
canh huong » anh huong, canh duong, manh huong
hien manh » hien hanh, tien manh, hieu manh
luat canh » luat doanh, luat kinh, luc canh
van thanh » ban thanh, van tuan
dan toan » van toan, dan than, manh toan

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc hien manh - canh tranh luat canh huong ((dan toan) or (van thanh)) tap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc hien manh - canh tranh luat canh huong ((dan toan) OR (van thanh)) tap.
• Adding a wildcard symbol may retrieve word variants: hoc hien manh - canh tranh luat canh huong ((dan toan) or (van thanh)) tap*.