Perhaps you should try some spelling variations:
hanh thai » nhanh thai, hinh thai, hanh tai
thai cua » than cua, tai cuc, tri cua
va hanh » van hanh, va thanh, va danh
van bao » van ban, van dao
van bac » van ban, van hac, dan bac
vu sach » vu bach, vu khach
nang ma » tang ma, sang ma, nang cao
ty nang » ky nang, ty xang, ty hang
su sach » so sach
cua tre » cua te, cuu tre, cua triet
ma hoi » mai hoi, xa hoi, ma hoa

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 (su sach)) ty nang ma 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 (su sach)) ty nang ma hoi. hieu ((van bac) OR (van bao)) duc va hanh thai cua tre.
• Adding a wildcard symbol may retrieve word variants: ((vu sach) or (su sach)) ty nang ma hoi. hieu ((van bac) or (van bao)) duc va hanh thai cua tre*.