Perhaps you should try some spelling variations:
hanh vai » hanh vi, hanh va, hanh tai
su sach » so sach, vu sach
vai cua » dai cua, hai cua, lai cua
va hanh » van hanh, va thanh, va danh
cua tre » cua te, cuu tre, cua triet
ky tang » ky dang, kho tang, ky trong
ve cam » ve cham, va cam, ve cai
ve cac » va cac, vien cac
ma hoi » mai hoi, xa hoi, ma hoa
luc va » duc va, tuc va, loc va

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 tang) or (ky nang)) ma hoi. hieu ((ve cam) or (ve cac)) luc va hanh vai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ((ky tang) OR (ky nang)) ma hoi. hieu ((ve cam) OR (ve cac)) luc va hanh vai cua tre.
• Adding a wildcard symbol may retrieve word variants: su sach ((ky tang) or (ky nang)) ma hoi. hieu ((ve cam) or (ve cac)) luc va hanh vai cua tre*.