Perhaps you should try some spelling variations:
hanh thai » nhanh thai, hinh thai, hanh tai
thien van » thi van
nam duoc » nam thuoc, da duoc, dat duoc
thai cua » than cua, tai cuc, tri cua
hieu van » hieu va, lieu va, hieu ve
van hanh » van thanh, ban hanh, van anh
cao duc » dao duc, cao suc, giao duc
cua tre » cua te, cuu tre, cua triet
dang xa » dang xay, lang xa, dang ha
ky dang » ky nang, ky danh
dai ky » dan ky, dai ly, sai ky
su dai » sau dai, si dai, su tai

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 dang xa hoi. ((hieu van) or (thien van)) ((nam duoc) or (cao duc)) van hanh thai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su dai ky dang xa hoi. ((hieu van) OR (thien van)) ((nam duoc) OR (cao duc)) van hanh thai cua tre.
• Adding a wildcard symbol may retrieve word variants: su dai ky dang xa hoi. ((hieu van) or (thien van)) ((nam duoc) or (cao duc)) van hanh thai cua tre*.