Perhaps you should try some spelling variations:
nhanh thai » nhanh thi, nhanh thanh, nhanh thang
hanh thai » hinh thai, hanh tai, anh thai
hieu van » hieu va, thien van, lieu va
cua tre » cua te, cuu tre, cua triet
ky dang » ky nang, ky danh
dang xa » dang xay, lang xa, dang ha
cam duc » cam xuc, pham duc, nam duoc
cao duc » dao duc, cao suc, giao duc
su dai » sau dai, si dai, su tai
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 dang xa hoi. hieu van ((cam duc) or (cao duc)) van ((hanh thai) OR (nhanh thai)) cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su dai ky dang xa hoi. hieu van ((cam duc) OR (cao duc)) van ((hanh thai) OR (nhanh thai)) cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su dai ky dang xa hoi. hieu van ((cam duc) or (cao duc)) van ((hanh thai) OR (nhanh thai)) cua tre".
• Adding a wildcard symbol may retrieve word variants: su dai ky dang xa hoi. hieu van ((cam duc) or (cao duc)) van ((hanh thai) OR (nhanh thai)) cua tre*.