Perhaps you should try some spelling variations:
nuoc sach » nguoi sach, hoc sach, cuoc cach
toc sach » hoc sach, doc sach, thuoc sach
van hanh » van thanh, ban hanh, van anh
chat huu » pham huu
chat xuc » cam xuc, chao xu, chat cua
hieu van » hieu va, thien van, lieu va
nong va » nong van, dong va, cong va
tu nong » tu dong, tu cong, tu tong
cua tre » cua te, cuu tre, cua triet
va hoi » xa hoi, va hoc, va hoa
vi cua » vai cua, di cua

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((toc sach) or (nuoc sach)) tu nong va hoi. hieu van ((chat xuc) or (chat huu)) van hanh vi cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((toc sach) OR (nuoc sach)) tu nong va hoi. hieu van ((chat xuc) OR (chat huu)) van hanh vi cua tre.
• Adding a wildcard symbol may retrieve word variants: ((toc sach) or (nuoc sach)) tu nong va hoi. hieu van ((chat xuc) or (chat huu)) van hanh vi cua tre*.