Perhaps you should try some spelling variations:
cua triet » cua viet, su triet
tinh vien » sinh vien, tinh dien, tinh viet
va triet » va thiet, va trien, ve triet
hieu van » hieu va, thien van, lieu va
va tinh » may tinh
nam xuc » cam xuc, nam xua, nam thuc
nang xa » nang x, lang xa, nang ma
xuc va » duc va, tuc va, luc va
sac ky » cac 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 ((sac ky) or (sai ky)) nang xa hoi. hieu van nam xuc va tinh vien ((cua triet) OR (va triet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu ((sac ky) OR (sai ky)) nang xa hoi. hieu van nam xuc va tinh vien ((cua triet) OR (va triet)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu ((sac ky) or (sai ky)) nang xa hoi. hieu van nam xuc va tinh vien ((cua triet) OR (va triet))".
• Adding a wildcard symbol may retrieve word variants: tu ((sac ky) or (sai ky)) nang xa hoi. hieu van nam xuc va tinh vien ((cua triet) OR (va triet))*.