Perhaps you should try some spelling variations:
ban thanh » ban hanh, ban hang
thanh tai » thanh hai, thanh toan, doanh tai
hoc sach » hoc sinh, hoc cac
cam quoc » cac quoc, cao quoc, nam quoc
quoc ban » quoc bao, quoc lan, quoc quan
te sach » toc sach
hoc anh » hoc nganh, hoc nhanh, ngoc anh
nang xa » nang x, lang xa, nang ma
hieu va » lieu va, hieu qua
tai cuu » tai cuc, tai buu, tai cua
cuu tre » cua tre, cau tren, cau treo
va cam » va cham, va cac, va cao

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) OR (hoc anh)))) ky nang xa hoi. hieu va cam quoc ban thanh tai cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((te sach) OR (((hoc sach) OR (hoc anh)))) ky nang xa hoi. hieu va cam quoc ban thanh tai cuu tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((te sach) or (((hoc sach) OR (hoc anh)))) ky nang xa hoi. hieu va cam quoc ban thanh tai cuu tre".
• Adding a wildcard symbol may retrieve word variants: ((te sach) or (((hoc sach) OR (hoc anh)))) ky nang xa hoi. hieu va cam quoc ban thanh tai cuu tre*.