Perhaps you should try some spelling variations:
ban hanh » ban hang
cua viet » ca viet, hoa viet, cua vat
tu tong » tu tuong, tu trong, tu dong
hieu ve » hieu va, hieu van
cac xuc » cam xuc, cac nuoc, chat xuc
va hanh » van hanh, va thanh, va danh
su cac » tu cac, su cao, su can
cac tu » cac thu, cach tu, cac du
ve cac » va cac, vien cac
vi cua » vai cua, di cua
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: su cac tu tong ((o hoi) or (x ho)). hieu ve cac xuc ((va hanh) or (ban hanh)) vi cua viet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su cac tu tong ((o hoi) OR (x ho)). hieu ve cac xuc ((va hanh) OR (ban hanh)) vi cua viet.
• Adding a wildcard symbol may retrieve word variants: su cac tu tong ((o hoi) or (x ho)). hieu ve cac xuc ((va hanh) or (ban hanh)) vi cua viet*.