Perhaps you should try some spelling variations:
nham thuc » nhan thuc, nam thuc, nham thu
toc sach » hoc sach, doc sach, thuoc sach
van hanh » van thanh, ban hanh, van anh
thuc van » thuc vat, thuc dan, thuc va
hieu va » lieu va, hieu qua
hanh di » hanh vi, hanh de, hang di
va nham » va cham, va tham, va nha
ty nang » ky nang, ty xang, ty hang
hoc anh » hoc nganh, hoc nhanh, ngoc anh
cua tre » cua te, cuu tre, cua triet
di cua » dai cua, doi cua, de cua
x hoi » xa hoi, o hoi, x ho

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: ((((te sach) OR (toc sach))) OR (hoc anh)) ty nang x hoi. hieu va nham thuc van hanh di cua tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((te sach) OR (toc sach))) or (hoc anh)) ty nang x hoi. hieu va nham thuc van hanh di cua tre~".
• Adding a wildcard symbol may retrieve word variants: ((((te sach) OR (toc sach))) or (hoc anh)) ty nang x hoi. hieu va nham thuc van hanh di cua tre*.