Perhaps you should try some spelling variations:
thanh tai » thanh hai, thanh toan, doanh tai
ban thanh » ban hanh, ban hang
hoc sach » hoc sinh, hoc cac, hoc anh
quoc ban » quoc bao, quoc lan, quoc quan
cam quoc » cac quoc, cao quoc, nam quoc
te sach » toc sach
tai cua » thai cua, tai cuc, tri cua
hieu va » lieu va, hieu qua
mai hoi » mai khoi, dai hoi, lai hoi
cua tre » cua te, cuu tre, cua triet
va cam » va cham, va cac, va cao
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: ((te sach) or (hoc sach)) ky nang ((ma hoi) OR (mai hoi)). hieu va cam quoc ban thanh tai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((te sach) OR (hoc sach)) ky nang ((ma hoi) OR (mai hoi)). hieu va cam quoc ban thanh tai cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((te sach) or (hoc sach)) ky nang ((ma hoi) OR (mai hoi)). hieu va cam quoc ban thanh tai cua tre".
• Adding a wildcard symbol may retrieve word variants: ((te sach) or (hoc sach)) ky nang ((ma hoi) OR (mai hoi)). hieu va cam quoc ban thanh tai cua tre*.