Perhaps you should try some spelling variations:
su sach » so sach, vu sach
va hanh » van hanh, va thanh, va danh
ly vang » ly hang, ly van, ly quang
ly nang » ky nang, ly hang, ly quang
cua tre » cua te, cuu tre, cua triet
ve cac » vien cac
thu va » thuc va, thue va, tu va
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 ((ly nang) OR (ly vang)) xa hoi. hieu ((ve cac) OR (va cac)) thu va hanh vi cua tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ((ly nang) or (ly vang)) xa hoi. hieu ((ve cac) OR (va cac)) thu va hanh vi cua tre~".
• Adding a wildcard symbol may retrieve word variants: su sach ((ly nang) or (ly vang)) xa hoi. hieu ((ve cac) OR (va cac)) thu va hanh vi cua tre*.