Perhaps you should try some spelling variations:
doc sach » hoc sach, toc sach, nuoc sach
hieu van » hieu va, thien van, lieu va
cau phuc » cau truc, chau phu, huu phuc
sach ly » sach y, sach lo, sach ty
ly nang » ky nang, ly hang, ly vang
anh vai » anh va, anh bai, anh van
vai cua » dai cua, hai cua, lai cua
cua tre » cua te, cuu tre, cua triet
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: doc sach ly nang x hoi. hieu van ((cau phuc) or (cam xuc)) tuan anh vai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doc sach ly nang x hoi. hieu van ((cau phuc) OR (cam xuc)) tuan anh vai cua tre.
• Adding a wildcard symbol may retrieve word variants: doc sach ly nang x hoi. hieu van ((cau phuc) or (cam xuc)) tuan anh vai cua tre*.