Perhaps you should try some spelling variations:
thu sach » tu sach, thuat sach, thuoc sach
hieu ve » hieu va, hieu van
cac duc » cac du, cao duc, cac dac
va hanh » van hanh, va thanh, va danh
vai cua » dai cua, lai cua, bai cua
hai cua » thai cua, dai cua, hoi cua
y nang » ly nang, v nang, may nang
ve cac » va cac, vien cac

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