Perhaps you should try some spelling variations:
phuong bang » phuong hoang, phuong giang, phuong quang
theo chieu » theo tieu, ho chieu, theo chu
chieu sach » chinh sach, chiet tach, chieu sang
nhung bong » nhung cong, nhung bang, nhung chong
cong dap » cong dan, cong lap, cong da
van toan » van tuan, van tan, van thanh
toan ban » van ban

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

• Performing a fuzzy search may retrieve terms with similar spellings: theo chieu sach - thanh cong dap ((nhung bong) or (phuong bang)) van toan ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo chieu sach - thanh cong dap ((nhung bong) OR (phuong bang)) van toan ban.
• Adding a wildcard symbol may retrieve word variants: theo chieu sach - thanh cong dap ((nhung bong) or (phuong bang)) van toan ban*.