Perhaps you should try some spelling variations:
van thanh » ban thanh, van tuan
cham duc » pham duc, cham soc, pham duy
su triet » su viet, ve triet
thanh vi » hanh vi, thanh va, thanh ve
tu sach » thu sach, su sach, te sach
duc van » duc va, duc tan, duc manh
ve cham » va cham, ve chat, vu cham
hieu ve » hieu va, hieu van
mai hoi » mai khoi, dai hoi, lai hoi
su tien » su kien, su hien, tu tieng
y nang » ky nang, ly nang, v nang
ma hoi » xa hoi, ma hoa, me hoi

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: tu sach y nang ((ma hoi) OR (mai hoi)). hieu ve cham duc van thanh vi ((su triet) OR (su tien))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach y nang ((ma hoi) OR (mai hoi)). hieu ve cham duc van thanh vi ((su triet) or (su tien))~".
• Adding a wildcard symbol may retrieve word variants: tu sach y nang ((ma hoi) OR (mai hoi)). hieu ve cham duc van thanh vi ((su triet) or (su tien))*.