Perhaps you should try some spelling variations:
tu cach » tu cac
co sach » bo sach, cuon sach, hoc sach
te sach » toc sach
hieu ve » hieu va, hieu van
cac xuc » cam xuc, cac nuoc, chat xuc
va hanh » van hanh, va thanh, va danh
cua tre » cua te, cuu tre, cua triet
ve cac » va cac, vien cac
xuc va » duc va, tuc va, luc va
vi cua » vai cua, di cua
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: ((((tu cach) or (co sach))) or (te sach)) ky nang x hoi. hieu ve cac xuc va hanh vi cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((((tu cach) OR (co sach))) OR (te sach)) ky nang x hoi. hieu ve cac xuc va hanh vi cua tre.
• Adding a wildcard symbol may retrieve word variants: ((((tu cach) or (co sach))) or (te sach)) ky nang x hoi. hieu ve cac xuc va hanh vi cua tre*.