Perhaps you should try some spelling variations:
su sach » so sach, vu sach
sach ky » sac ky, sach y, sach ty
nang co » nang cao, nang doc, nang noi
hieu ve » hieu va, hieu van
cua tre » cua te, cuu tre, cua triet
co hai » co dai, co hoi, o hai
ve cac » va cac, vien cac
xuc va » tuc va, xac va
luc va » tuc va, loc va
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: su sach ky nang co hai. hieu ve cac ((((xuc va) or (luc va))) or (duc va)) hanh vi cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ky nang co hai. hieu ve cac ((((xuc va) OR (luc va))) OR (duc va)) hanh vi cua tre.
• Adding a wildcard symbol may retrieve word variants: su sach ky nang co hai. hieu ve cac ((((xuc va) or (luc va))) or (duc va)) hanh vi cua tre*.