Perhaps you should try some spelling variations:
thien van » thi van
thanh vi » hanh vi, thanh va, thanh ve
va triet » va thiet, va trien, cua triet
ve triet » va trien, su triet
cao hoi » cau hoi, co hoi, cao hoc
luc van » luoc van, luu van, luc va
duc van » duc va, duc tan, duc manh
te sac » te sach, te cac, te san
sac ky » cac ky, sai ky

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

• If you are trying to use Boolean operators, they must be ALL CAPS: te sac ky nang cao hoi. thien van nam ((luc van) OR (duc van)) thanh vi ((va triet) OR (ve triet))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sac ky nang cao hoi. thien van nam ((luc van) or (duc van)) thanh vi ((va triet) OR (ve triet))~".
• Adding a wildcard symbol may retrieve word variants: te sac ky nang cao hoi. thien van nam ((luc van) or (duc van)) thanh vi ((va triet) OR (ve triet))*.