Perhaps you should try some spelling variations:
nham thuc » nhan thuc, nam thuc, nham thu
toc sach » hoc sach, doc sach, thuoc sach
thuc van » thuc vat, thuc dan, thuc va
vu sach » vu bach, su sach, vu khach
vai cua » dai cua, hai cua, lai cua
anh vai » anh va, anh bai, anh van
van anh » van thanh, tuan anh, van minh
cua tre » cua te, cuu tre, cua triet
hieu va » lieu va, hieu qua
hieu ve » hieu van
nang xa » nang x, lang xa, nang ma

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

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