Perhaps you should try some spelling variations:
hanh trinh » canh tranh, hanh chinh
cua triet » cua viet, su triet, va triet
hanh tri » thanh tri, hanh tai, hanh triet
hieu van » hieu va, thien van, lieu va
van cao » van dao, van bao, van hao
cao duc » dao duc, cao suc, giao duc
duc van » duc va, duc tan, duc manh
dang xa » dang xay, lang xa, dang ha
ky dang » ky nang, ky danh
cua tre » cua te, cuu tre, dua tren
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 cao duc van ((hanh tri) or (hanh trinh)) ((cua tre) OR (cua triet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su dai ky dang xa hoi. hieu van cao duc van ((hanh tri) OR (hanh trinh)) ((cua tre) OR (cua triet)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "su dai ky dang xa hoi. hieu van cao duc van ((hanh tri) or (hanh trinh)) ((cua tre) OR (cua triet))".
• Adding a wildcard symbol may retrieve word variants: su dai ky dang xa hoi. hieu van cao duc van ((hanh tri) or (hanh trinh)) ((cua tre) OR (cua triet))*.