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