Perhaps you should try some spelling variations:
van thanh » ban thanh, van tuan
thanh dai » thanh hai, thanh tai, thanh dat
ky tang » ky nang, ky dang, kho tang
tang ma » mang may, tang van
hieu ve » hieu va, hieu van
cam duc » cam xuc, cao duc, nam duoc
cua tre » cua te, cuu tre, cua triet
su sai » su tai, su hai, su dai
sai ky » sac ky
ma hoi » mai hoi, xa hoi, ma hoa

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