Perhaps you should try some spelling variations:
hieu van » hieu va, thien van, lieu va
hanh tri » thanh tri, hanh tai, hanh trinh
su sach » vu sach
so sach » so sanh, bo sach, co sach
ty nang » ky nang, ty hang, ly nang
van bac » van ban, van bao, van hac
va hanh » van hanh, va thanh, va danh
cua tre » cua te, cuu tre, cua triet
xuc va » duc va, tuc va, luc 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) or (so sach)) ((ty nang) or (ty xang)) xa hoi. hieu van bac xuc va hanh tri cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((su sach) OR (so sach)) ((ty nang) OR (ty xang)) xa hoi. hieu van bac xuc va hanh tri cua tre.
• Adding a wildcard symbol may retrieve word variants: ((su sach) or (so sach)) ((ty nang) or (ty xang)) xa hoi. hieu van bac xuc va hanh tri cua tre*.