Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
hieu vien » hieu hien, hieu viec, thieu nien
vien dai » hien dai
thuc dan » thuc hanh, thuc vat
hang doi » hang di, hang loi, huong doi
hang vi » hang va, hanh vi, hang di
so sach » so sanh, bo sach, co sach
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 dai ((thuc dan) OR (hoc dan)) ((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 vien dai ((thuc dan) OR (hoc dan)) ((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 vien dai ((thuc dan) OR (hoc dan)) ((hang doi) or (hang vi)) cua triet*".