Perhaps you should try some spelling variations:
toc sach » hoc sach, doc sach, thuoc sach
cua dang » cua cong, cua ban
thanh di » thanh doi, thanh de, thanh do
va thanh » gia thanh, ban thanh, va tinh
cam thuc » am thuc, nam thuc, cam thu
vu dang » su dang, vu quang
hieu va » lieu va, hieu qua
thuc va » thuc vat, thuc dan, thuc day
cua tre » cua te, cuu tre, cua triet
va cam » va cham, va cac, va cao
v nang » va nang, vu nang, van nang
di cua » dai cua, doi cua, de 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: toc sach ((v nang) OR (((vu dang) OR (cua dang)))) xa hoi. hieu va cam thuc va thanh di cua tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "toc sach ((v nang) or (((vu dang) OR (cua dang)))) xa hoi. hieu va cam thuc va thanh di cua tre~".
• Adding a wildcard symbol may retrieve word variants: toc sach ((v nang) or (((vu dang) OR (cua dang)))) xa hoi. hieu va cam thuc va thanh di cua tre*.