Perhaps you should try some spelling variations:
thu sach » tu sach, thuat sach, thuoc sach
va cham » va chat, va tham
thuc va » thuc vat, thuc dan, thuc day
va danh » va dinh, va dan, va hanh
vai cua » dai cua, hai cua, lai cua
y nang » ky nang, ly nang, v nang
va cai » va cac, va bai, va dai
vi cua » di cua

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

• Performing a fuzzy search may retrieve terms with similar spellings: thu sach y nang x ho. hieu ((va cai) or (va cham)) thuc va danh ((vi cua) OR (vai cua)) te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu sach y nang x ho. hieu ((va cai) OR (va cham)) thuc va danh ((vi cua) OR (vai cua)) te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thu sach y nang x ho. hieu ((va cai) or (va cham)) thuc va danh ((vi cua) OR (vai cua)) te".
• Adding a wildcard symbol may retrieve word variants: thu sach y nang x ho. hieu ((va cai) or (va cham)) thuc va danh ((vi cua) OR (vai cua)) te*.