Perhaps you should try some spelling variations:
thu sach » tu sach, thuat sach, thuoc sach
hieu va » lieu va, hieu qua
danh ca » dan ca, doanh cua, danh cho
cua tre » cua te, cuu tre, cua triet
y nang » ky nang, ly nang, v nang
toc va » hoc va, tuc va, loc va
toc ta » toc tay, toc thai
ca cua » co cua

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 ((toc va) OR (toc ta)) danh ca cua tre~.
• 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 ((toc va) OR (toc ta)) danh ca cua tre~".
• Adding a wildcard symbol may retrieve word variants: thu sach y nang ((le hoi) or (ma hoa)). hieu va cac ((toc va) OR (toc ta)) danh ca cua tre*.