Perhaps you should try some spelling variations:
thanh thai » thanh hai, thanh tai, nhanh thai
van thanh » ban thanh, van tuan
ky tang » ky nang, ky dang, kho tang
tang xa » trang xa, tang ma, lang xa
hieu ve » hieu va, hieu van
cua tre » cuu tre, cua triet, dua tren
cam duc » cam xuc, cao duc, nam duoc
su dai » sau dai, si dai, su tai
cua te » cua tu
dai ky » dan ky, dai ly, sai ky

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: su dai ky tang xa hoi. hieu ve ((cam duc) or (pham duc)) van thanh thai ((cua tre) OR (cua te))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su dai ky tang xa hoi. hieu ve ((cam duc) OR (pham duc)) van thanh thai ((cua tre) OR (cua te)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "su dai ky tang xa hoi. hieu ve ((cam duc) or (pham duc)) van thanh thai ((cua tre) OR (cua te))".
• Adding a wildcard symbol may retrieve word variants: su dai ky tang xa hoi. hieu ve ((cam duc) or (pham duc)) van thanh thai ((cua tre) OR (cua te))*.