Perhaps you should try some spelling variations:
thanh thai » thanh hai, thanh tai, nhanh thai
van thanh » ban thanh, van tuan
hieu van » hieu va, thien van, lieu va
thai cua » than cua, tai cuc, tri cua
tang mai » tang ma, tang tai, lang mai
cam duc » cam xuc, cao duc, nam duoc
cua tre » cua te, cuu tre, cua triet
mai hoi » mai khoi, dai hoi, lai hoi
hieu ve » hieu va
ky tang » ky nang, ky dang, kho tang
sai ky » sac ky
su sai » su tai, su hai, su dai

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

• Performing a fuzzy search may retrieve terms with similar spellings: su sai ky tang mai hoi. ((hieu ve) or (hieu van)) ((cam duc) or (pham duc)) van thanh thai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sai ky tang mai hoi. ((hieu ve) OR (hieu van)) ((cam duc) OR (pham duc)) van thanh thai cua tre.
• Adding a wildcard symbol may retrieve word variants: su sai ky tang mai hoi. ((hieu ve) or (hieu van)) ((cam duc) or (pham duc)) van thanh thai cua tre*.