Perhaps you should try some spelling variations:
thanh tai » thanh hai, thanh toan, thanh san
tu sach » thu sach, su sach, te sach
ky lang » ky dang, ky tang, tay lang
hieu va » lieu va, hieu qua
xuc van » duc van, luc van, vuc van
cuc tre » duc tre, cua tre, cuu tre
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: tu sach ((ky lang) OR (ky nang)) van hoa. hieu va cam xuc van ((thanh tai) or (doanh tai)) cuc tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ((ky lang) OR (ky nang)) van hoa. hieu va cam xuc van ((thanh tai) OR (doanh tai)) cuc tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ((ky lang) OR (ky nang)) van hoa. hieu va cam xuc van ((thanh tai) or (doanh tai)) cuc tre".
• Adding a wildcard symbol may retrieve word variants: tu sach ((ky lang) OR (ky nang)) van hoa. hieu va cam xuc van ((thanh tai) or (doanh tai)) cuc tre*.