Perhaps you should try some spelling variations:
nhung duong » nhung dung, nhung huong, nhung tuong
duong manh » duong van
canh manh » canh tranh, cach mang, van manh
lanh manh » lanh tranh, lan anh, van manh
manh toan » thanh toan, anh tuan, tinh toan
cac tinh » dac tinh, cuu tinh, ban tinh
toan ban » van ban
ha tinh » va tinh, may tinh

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc ((cac tinh) or (ha tinh)) - ((canh manh) or (lanh manh)) va nhung duong manh toan ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((cac tinh) OR (ha tinh)) - ((canh manh) OR (lanh manh)) va nhung duong manh toan ban.
• Adding a wildcard symbol may retrieve word variants: hoc ((cac tinh) or (ha tinh)) - ((canh manh) or (lanh manh)) va nhung duong manh toan ban*.