Perhaps you should try some spelling variations:
nham thuc » nhan thuc, nam thuc, nham thu
doc sach » hoc sach, nuoc sach, dac sac
toc sach » hoc sach, thuoc sach, nuoc sach
viet cua » viec cua, viet ca, viet qua
nang xa » nang x, lang xa, nang ma
va nham » va cham, va tham, va nha
thuc va » thuc vat, thuc dan, thuc day
cua tre » cua te, cuu tre, cua triet
y nang » ky nang, ly nang, v nang
va anh » van anh, va hanh, va danh

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: ((doc sach) or (toc sach)) y nang xa hoi. lieu va nham thuc va anh viet cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((doc sach) OR (toc sach)) y nang xa hoi. lieu va nham thuc va anh viet cua tre.
• Adding a wildcard symbol may retrieve word variants: ((doc sach) or (toc sach)) y nang xa hoi. lieu va nham thuc va anh viet cua tre*.