Perhaps you should try some spelling variations:
hanh thai » nhanh thai, hinh thai, hanh tai
thai cua » than cua, tai cuc, tri cua
vu sach » su sach, vu khach
ty nang » ky nang, ty xang, ty hang
nang xa » nang x, lang xa, nang ma
van bac » van ban, van hac, dan bac
van bao » van ban, van dao
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) OR (vu bach)) ty nang xa hoi. hieu ((van bac) or (van bao)) duc va hanh thai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((vu sach) OR (vu bach)) ty nang xa hoi. hieu ((van bac) OR (van bao)) duc va hanh thai cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((vu sach) OR (vu bach)) ty nang xa hoi. hieu ((van bac) or (van bao)) duc va hanh thai cua tre".
• Adding a wildcard symbol may retrieve word variants: ((vu sach) OR (vu bach)) ty nang xa hoi. hieu ((van bac) or (van bao)) duc va hanh thai cua tre*.