Perhaps you should try some spelling variations:
ban hang » ngan hang
hieu ve » hieu va, hieu van
ve pham » vi pham, v pham, ve phan
duc ban » duc tan, duc van, dua ban
te sac » te sach, te cac, te san
sac ky » cac ky, sai ky
nang o » nang co, nang ho, nang ro
hai ve » hoai ve, hai vu, hoi ve
hai va » hai van, thai va, hoi va
o hoi » co hoi, o hoc, o hai

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

• Performing a fuzzy search may retrieve terms with similar spellings: te sac ky nang o hoi. hieu ve pham duc ban hang ((hai ve) or (hai va)) triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sac ky nang o hoi. hieu ve pham duc ban hang ((hai ve) OR (hai va)) triet.
• Adding a wildcard symbol may retrieve word variants: te sac ky nang o hoi. hieu ve pham duc ban hang ((hai ve) or (hai va)) triet*.