Perhaps you should try some spelling variations:
hieu van » hieu va, thien van, lieu va
van phat » va phat, van chat, van phan
phat duc » pham duc, phan duc, phan duoc
su triet » su viet, su tien, ve triet
nang xa » nang x, lang xa, nang ma
va danh » va dinh, va dan, va hanh
danh vi » hanh vi, dinh vi, danh di
cua tre » cua te, cuu tre, cua triet
tu dan » tuc dan, tu ban, cu dan
dan ky » van ky

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu dan ky nang xa hoi. hieu van phat duc va danh vi ((cua tre) or (su triet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu dan ky nang xa hoi. hieu van phat duc va danh vi ((cua tre) OR (su triet)).
• Adding a wildcard symbol may retrieve word variants: tu dan ky nang xa hoi. hieu van phat duc va danh vi ((cua tre) or (su triet))*.