Perhaps you should try some spelling variations:
hanh thai » nhanh thai, hinh thai, hanh tai
thai cua » than cua, tai cuc, tri cua
hieu van » hieu va, thien van, lieu va
su sach » vu sach
va hanh » van hanh, va thanh, va danh
van bac » van ban, van bao, van hac
ty nang » ky nang, ty hang, ly nang
so sach » so sanh, bo sach, co sach
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 thai 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 thai cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((su sach) or (so sach)) ((ty nang) OR (ty xang)) xa hoi. hieu van bac xuc va hanh thai 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 thai cua tre*.