Perhaps you should try some spelling variations:
su sach » so sach, vu sach
va hanh » van hanh, va thanh, va danh
cam luc » cau luc
sach lo » sach dao, sach doi, sach hoi
hieu ve » hieu va, hieu van
nang xa » nang x, lang xa, nang ma
cua tre » cua te, cuu tre, cua triet
vi cua » vai cua, di cua

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

• If you are trying to use Boolean operators, they must be ALL CAPS: su sach lo ((nang xa) OR (nang cao)) hoi. hieu ve ((cam luc) OR (cam xuc)) va hanh vi cua tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach lo ((nang xa) or (nang cao)) hoi. hieu ve ((cam luc) OR (cam xuc)) va hanh vi cua tre~".
• Adding a wildcard symbol may retrieve word variants: su sach lo ((nang xa) or (nang cao)) hoi. hieu ve ((cam luc) OR (cam xuc)) va hanh vi cua tre*.