Perhaps you should try some spelling variations:
vai cua » dai cua, hai cua, lai cua
dan vai » dan va, dan tai, dan vat
cham lo » cham o, cam lo, cham soc
ve cham » va cham, ve chat, vu cham
hieu ve » hieu va, hieu van
tu sach » thu sach, su sach, te sach
mai hoi » mai khoi, dai hoi, lai hoi
ty nang » ky nang, ty hang, ly nang
cua tre » cua te, cuu tre, cua triet
va dan » ca dan, va dao, va dau
lo va » lo van, lao va, ly va

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu sach ((ty nang) or (ty xang)) ((mai hoi) or (ma hoa)). hieu ve cham lo va dan vai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ((ty nang) OR (ty xang)) ((mai hoi) OR (ma hoa)). hieu ve cham lo va dan vai cua tre.
• Adding a wildcard symbol may retrieve word variants: tu sach ((ty nang) or (ty xang)) ((mai hoi) or (ma hoa)). hieu ve cham lo va dan vai cua tre*.