Perhaps you should try some spelling variations:
phuong cong » phuong dong, phong cong, phung cong
luan phuong » lan phuong, quang phuong, doan phuong
tranh luan » trinh luan, trinh luat, doanh luan
manh toan » thanh toan, anh tuan, tinh toan
doc hieu » toc thieu, hoc thieu, hoc hien
san toan » van toan, dan toan, xuan toan
doi chi » doi khi

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) or (doi chi)) xanh - canh tranh luan phuong cong ((san toan) or (manh toan)) ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((doc hieu) OR (doi chi)) xanh - canh tranh luan phuong cong ((san toan) OR (manh toan)) ban.
• Adding a wildcard symbol may retrieve word variants: ((doc hieu) or (doi chi)) xanh - canh tranh luan phuong cong ((san toan) or (manh toan)) ban*.