Perhaps you should try some spelling variations:
thien van » thi van
luoc van » luoc va, luc van, luot van
luoc can » luc canh, hoc can, luoc dai
thanh vi » hanh vi, thanh va, thanh ve
va triet » va thiet, va trien, ve triet
te sac » te sach, te cac, te san
sac ky » cac ky, sai ky
co hoi » co loi
vi va » vi van, vai va, vu va

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 ((co hoi) or (co hoc)). thien van nam ((luoc van) or (luoc can)) thanh vi va triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sac ky nang ((co hoi) OR (co hoc)). thien van nam ((luoc van) OR (luoc can)) thanh vi va triet.
• Adding a wildcard symbol may retrieve word variants: te sac ky nang ((co hoi) or (co hoc)). thien van nam ((luoc van) or (luoc can)) thanh vi va triet*.