Perhaps you should try some spelling variations:
nhung bong » nhung cong, nhung bang, nhung chong
hieu luch » hieu luat, hieu cach, hieu tuc
doanh cua » doanh luan
hieu luc » hieu luat, hieu qua
manh cua » ban cua
bong van » song van, tong van, hong van
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: hoc ((hieu luch) or (hieu luc)) - hanh ((manh cua) or (doanh cua)) nhung bong van toan ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((hieu luch) OR (hieu luc)) - hanh ((manh cua) OR (doanh cua)) nhung bong van toan ban.
• Adding a wildcard symbol may retrieve word variants: hoc ((hieu luch) or (hieu luc)) - hanh ((manh cua) or (doanh cua)) nhung bong van toan ban*.