Perhaps you should try some spelling variations:
phuong manh » phuong anh, phung manh, phuong danh
chiet tach » chieu sach
manh toan » thanh toan, anh tuan, tinh toan
ho chiet » ho chieu, ho thiet, hoc thiet
toan ban » van ban
van nhi » van noi, van nghe, van nhan
van chi » van chien, luan chi, van chat

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

• Performing a fuzzy search may retrieve terms with similar spellings: ho chiet tach - canh tranh ((van nhi) or (van chi)) phuong manh toan ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho chiet tach - canh tranh ((van nhi) OR (van chi)) phuong manh toan ban.
• Adding a wildcard symbol may retrieve word variants: ho chiet tach - canh tranh ((van nhi) or (van chi)) phuong manh toan ban*.