Perhaps you should try some spelling variations:
hieu vien » hieu hien, hieu viec, thieu nien
cua triet » cua viet, va triet
su triet » su viet, su tien, ve triet
vien cac » vien bach, vien dai, vien da
cac truc » cau truc, cac tru, cac trung
truc van » truc va, thuc van, truc ban
hang vi » hang va, hanh vi, khang voi
so sach » so sanh, bo sach, co sach
hang di » hang doi, hang dien, hang dich
nang xa » nang x, lang xa, nang ma
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 vien cac truc van ((hang di) or (hang vi)) ((cua triet) OR (su triet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so sach y nang xa hoi. hieu vien cac truc van ((hang di) OR (hang vi)) ((cua triet) OR (su triet))*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "so sach y nang xa hoi. hieu vien cac truc van ((hang di) or (hang vi)) ((cua triet) OR (su triet))*".