Perhaps you should try some spelling variations:
thu sach » tu sach, thuat sach, thuoc sach
hieu va » lieu va, hieu qua
cac tuc » cac toc, cac tu, cac tac
va danh » va dinh, va dan, va hanh
danh ca » dan ca, doanh cua, danh cho
cua tre » cuu tre, cua triet, dua tren
y nang » ky nang, ly nang, v nang
tuc va » thuc va, truc va, tuc xa
cua te » cua tu

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 ((le hoi) OR (ma hoa)). hieu va cac tuc va danh ca ((cua tre) OR (cua te))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thu sach y nang ((le hoi) or (ma hoa)). hieu va cac tuc va danh ca ((cua tre) OR (cua te))~".
• Adding a wildcard symbol may retrieve word variants: thu sach y nang ((le hoi) or (ma hoa)). hieu va cac tuc va danh ca ((cua tre) OR (cua te))*.