Perhaps you should try some spelling variations:
thanh tai » thanh hai, thanh toan, doanh tai
tu sach » thu sach, su sach, te sach
xuc ban » duc ban, quoc ban, xuat ban
tai cuu » tai cuc, tai buu, tai cua
cuc ban » cua ban, cac ban, cuu ban
sach ky » sac ky, sach y, sach ty
cao hoc » co hoc, cho hoc, chat hoc
cuu tre » cua tre, cau tren, cau treo
va cam » va cham, va cao, va cai

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