Perhaps you should try some spelling variations:
te sach » toc sach
hoi cua » hoi chuc
hai cua » thai cua, dai cua, lai cua
va hanh » van hanh, va thanh, va danh
cao duc » dao duc, cao suc, giao duc
hieu ve » hieu va, hieu van
ly nang » ky nang, ly hang, ly vang
y nang » ky nang, v nang, may nang
ve cao » va cao, ve bao, ve cac
ma hoi » mai hoi, xa hoi, ma hoa

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 sach ((y nang) OR (ly nang)) ma hoi. hieu ve cao duc va hanh ((hai cua) OR (hoi cua)) te~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ((y nang) OR (ly nang)) ma hoi. hieu ve cao duc va hanh ((hai cua) or (hoi cua)) te~".
• Adding a wildcard symbol may retrieve word variants: te sach ((y nang) OR (ly nang)) ma hoi. hieu ve cao duc va hanh ((hai cua) or (hoi cua)) te*.