Perhaps you should try some spelling variations:
thanh tai » thanh hai, thanh toan, doanh tai
va thanh » gia thanh, ban thanh, va tinh
cham lao » chai lao, cham lai, cham vao
sach ky » sac ky, sach y, sach ty
tai cua » thai cua, tai cuc, tri cua
vu cham » va cham, vu kham, tu cham
hieu vu » hieu va, hieu ve, hieu su
tu sach » thu sach, su sach, te sach
dai hoi » dai hoc, dai hai, dai moi
mai hoi » mai khoi, lai hoi, mai doi
cua tre » cua te, cuu tre, cua triet
lao va » tao va, cao va, bao va
ma hoi » xa hoi, ma hoa, me hoi

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 ky nang ((ma hoi) or (((mai hoi) or (dai hoi)))). hieu vu cham lao va thanh tai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ky nang ((ma hoi) OR (((mai hoi) OR (dai hoi)))). hieu vu cham lao va thanh tai cua tre.
• Adding a wildcard symbol may retrieve word variants: tu sach ky nang ((ma hoi) or (((mai hoi) or (dai hoi)))). hieu vu cham lao va thanh tai cua tre*.