Perhaps you should try some spelling variations:
thien van » thi van
nhan thuc » dan thuc, toan thuc
thu sach » tu sach, thuat sach, thuoc sach
nhan luc » nang luc
day danh » day manh, dai danh, dao danh
danh dai » danh dau, danh di, danh sai
nang xa » nang x, lang xa, nang ma
hieu va » lieu va, hieu qua
cua tre » cua te, cuu tre, cua triet
y nang » ky nang, ly nang, v nang

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 xa hoi. ((thien van) or (hieu va)) ((nhan thuc) or (nhan luc)) day danh dai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu sach y nang xa hoi. ((thien van) OR (hieu va)) ((nhan thuc) OR (nhan luc)) day danh dai cua tre.
• Adding a wildcard symbol may retrieve word variants: thu sach y nang xa hoi. ((thien van) or (hieu va)) ((nhan thuc) or (nhan luc)) day danh dai cua tre*.