Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
hang doi » hang loi, huong doi, hang tai
hieu ve » hieu va, hieu van
cac tuc » cac toc, cac tu, cac tac
tuc van » thuc van, truc van, tuc va
hang di » hang dien, hang dich, hang tai
nang xa » nang x, lang xa, nang ma
hang vi » hang va, hanh vi, khang voi
so sach » so sanh, bo sach, co sach
ve cac » va cac, vien cac
y nang » ky nang, ly nang, v nang

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

• Performing a fuzzy search may retrieve terms with similar spellings: so sach y nang xa hoi. hieu ve cac tuc van ((((hang di) OR (hang doi))) or (hang vi)) cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so sach y nang xa hoi. hieu ve cac tuc van ((((hang di) OR (hang doi))) OR (hang vi)) cua triet*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "so sach y nang xa hoi. hieu ve cac tuc van ((((hang di) OR (hang doi))) or (hang vi)) cua triet*".