Perhaps you should try some spelling variations:
ban thanh » ban hanh, ban hang
thanh tai » thanh hai, thanh toan, doanh tai
toc sach » hoc sach, doc sach, thuoc sach
cuu tre » cau tren, cau treo
cua tre » cua te, cua triet, dua tren
ky lang » ky nang, ky dang, ky tang
lang xa » lang ha, dang xay, lang van
xuc ban » duc ban, cuc ban, quoc ban
te sac » te sach, te cac, te san
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 sac) or (toc sach)) ky lang xa hoi. lieu va cam xuc ban thanh tai ((cua tre) OR (cuu tre))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((te sac) OR (toc sach)) ky lang xa hoi. lieu va cam xuc ban thanh tai ((cua tre) OR (cuu tre)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((te sac) or (toc sach)) ky lang xa hoi. lieu va cam xuc ban thanh tai ((cua tre) OR (cuu tre))".
• Adding a wildcard symbol may retrieve word variants: ((te sac) or (toc sach)) ky lang xa hoi. lieu va cam xuc ban thanh tai ((cua tre) OR (cuu tre))*.