Perhaps you should try some spelling variations:
hanh thai » nhanh thai, hinh thai, hanh tai
thu sach » tu sach, thuat sach, thuoc sach
thai cua » than cua, tai cuc, tri cua
vu cham » va cham, vu kham, tu cham
hieu vu » hieu va, hieu ve, hieu su
ty nang » ky nang, ty hang, ly nang
cua tre » cua te, cuu tre, cua triet
ma hoi » mai hoi, xa hoi, ma hoa
lo van » le van, vo van, so van
lo va » lao va, ly va, le va

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

• Performing a fuzzy search may retrieve terms with similar spellings: thu sach ((ty nang) OR (ty xang)) ma hoi. hieu vu cham ((lo va) or (lo van)) hanh thai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu sach ((ty nang) OR (ty xang)) ma hoi. hieu vu cham ((lo va) OR (lo van)) hanh thai cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thu sach ((ty nang) OR (ty xang)) ma hoi. hieu vu cham ((lo va) or (lo van)) hanh thai cua tre".
• Adding a wildcard symbol may retrieve word variants: thu sach ((ty nang) OR (ty xang)) ma hoi. hieu vu cham ((lo va) or (lo van)) hanh thai cua tre*.