Perhaps you should try some spelling variations:
nam duoc » nam thuoc, da duoc, dat duoc
than cua » nhan cua, thai cua, ban cua
anh than » anh thanh, anh tuan, anh nhan
cao duc » dao duc, cao suc, giao duc
van anh » van thanh, tuan anh, van minh
cua tre » cua te, cuu tre, cua triet
cam duc » cam xuc, pham duc, lam duoc
tang xa » trang xa, tang ma, lang xa
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 xa hoi. hieu qua ((((cam duc) or (nam duoc))) or (cao duc)) van anh than cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sai ky tang xa hoi. hieu qua ((((cam duc) OR (nam duoc))) OR (cao duc)) van anh than cua tre.
• Adding a wildcard symbol may retrieve word variants: su sai ky tang xa hoi. hieu qua ((((cam duc) or (nam duoc))) or (cao duc)) van anh than cua tre*.