Perhaps you should try some spelling variations:
toc sach » hoc sach, doc sach, thuoc sach
hieu van » hieu va, thien van, lieu va
van cham » van chat, van tham, va cham
cham xuc » cam xuc, chat xuc, cham soc
va hanh » van hanh, va thanh, ban hanh
hai cua » thai cua, dai cua, hoi cua
vai cua » dai cua, lai cua, bai cua
va danh » va dinh, va dan, dia danh
nang ma » tang ma, sang ma, nang cao
y nang » ky nang, ly nang, v nang
ma hoi » mai hoi, xa hoi, ma hoa

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

• Performing a fuzzy search may retrieve terms with similar spellings: toc sach y nang ma hoi. hieu van cham xuc ((va danh) or (va hanh)) ((vai cua) OR (hai cua)) tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc sach y nang ma hoi. hieu van cham xuc ((va danh) OR (va hanh)) ((vai cua) OR (hai cua)) tre*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "toc sach y nang ma hoi. hieu van cham xuc ((va danh) or (va hanh)) ((vai cua) OR (hai cua)) tre*".