Perhaps you should try some spelling variations:
nuoc sach » nguoi sach, cuoc cach, cuon sach
doc sach » toc sach, dac sac, bo sach
hieu van » hieu va, thien van, lieu va
van hanh » van thanh, ban hanh, van anh
chat xuc » chat huu, cam xuc, chao xu
van chat » cao chat
hoc sach » hoc sinh, hoc cac, hoc anh
tu nang » tru nang, tu nong, tu nano
nang xa » nang x, lang xa, nang ma
xuc van » duc van, luc van, vuc van
hanh di » hanh vi, hanh de, hang di
cua tre » cua te, cuu tre, cua triet
di cua » dai cua, doi cua, de cua

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 (((nuoc sach) or (hoc sach)))) tu nang xa hoi. hieu van chat xuc van hanh di cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((doc sach) OR (((nuoc sach) OR (hoc sach)))) tu nang xa hoi. hieu van chat xuc van hanh di cua tre.
• Adding a wildcard symbol may retrieve word variants: ((doc sach) or (((nuoc sach) or (hoc sach)))) tu nang xa hoi. hieu van chat xuc van hanh di cua tre*.