Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
hieu van » hieu va, thien van, lieu va
van tham » van thanh, van tuan, van chat
nang xa » nang x, lang xa, nang ma
cua tre » cua te, cuu tre, dua tren
danh vi » hanh vi, dinh vi, danh di
cu dan » cua dan, ca dan, co dan
do van » dao van, vo van, so van
dan ky » van ky
do va » so va

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: cu dan ky nang xa hoi. hieu van tham ((do va) OR (do van)) danh vi ((cua tre) or (cua triet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: cu dan ky nang xa hoi. hieu van tham ((do va) OR (do van)) danh vi ((cua tre) OR (cua triet)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "cu dan ky nang xa hoi. hieu van tham ((do va) OR (do van)) danh vi ((cua tre) or (cua triet))".
• Adding a wildcard symbol may retrieve word variants: cu dan ky nang xa hoi. hieu van tham ((do va) OR (do van)) danh vi ((cua tre) or (cua triet))*.