Perhaps you should try some spelling variations:
nhan thuc » nhan luc, dan thuc, toan thuc
thu sach » tu sach, thuat sach, thuoc sach
hieu cao » chieu cao, hieu ca, kieu cao
hieu cac » hieu luc, hieu va, hieu van
thuc va » thuc vat, thuc dan, thuc day
va danh » va dinh, va dan, va hanh
danh di » danh du, xanh di, danh dien
cua tre » cua te, cuu tre, cua triet
y nang » ky nang, ly nang, v nang
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.

• Performing a fuzzy search may retrieve terms with similar spellings: thu sach y nang x hoi. ((hieu cao) or (hieu cac)) nhan thuc va danh di cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu sach y nang x hoi. ((hieu cao) OR (hieu cac)) nhan thuc va danh di cua tre.
• Adding a wildcard symbol may retrieve word variants: thu sach y nang x hoi. ((hieu cao) or (hieu cac)) nhan thuc va danh di cua tre*.