Perhaps you should try some spelling variations:
hanh thai » nhanh thai, hinh thai, hanh tai
hieu van » hieu va, thien van, lieu va
thai cua » than cua, tai cuc, tri cua
vu sach » vu bach, su sach, vu khach
ty nang » ty hang, ly nang, ty nong
ban duc » ban duoc, van duc, ban dac
va hanh » van hanh, va thanh, va danh
cua tre » cua te, cuu tre, cua triet

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

• Performing a fuzzy search may retrieve terms with similar spellings: vu sach ((((ty nang) or (ky nang))) or (ty xang)) xa hoi. hieu van ban duc va hanh thai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: vu sach ((((ty nang) OR (ky nang))) OR (ty xang)) xa hoi. hieu van ban duc va hanh thai cua tre.
• Adding a wildcard symbol may retrieve word variants: vu sach ((((ty nang) or (ky nang))) or (ty xang)) xa hoi. hieu van ban duc va hanh thai cua tre*.