Perhaps you should try some spelling variations:
van thanh » ban thanh, van tuan
thanh tai » thanh hai, thanh toan, doanh tai
lang van » dang van, tang van, hoang van
sach ky » sac ky, sach ty, sach kem
hieu va » lieu va
xuc van » duc van, luc van, vuc van
tai cuu » tai cuc, tai buu, tai cua
cuu tre » cua tre, cau tren, cau treo

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