Perhaps you should try some spelling variations:
su triet » su viet, su tien, ve triet
cac cach » cai cach, cuoc cach, va cach
sach ly » sach y, sach lo, sach ty
hang vi » hang va, hanh vi, khang voi
hang di » hang doi, hang dien, hang dich
so sach » so sanh, bo sach, co sach
cac bac » cac bai, cac ban, sach bac
hieu ve » hieu va, hieu van
nang xa » nang x, lang xa, nang ma
ly nang » ky nang, ly hang, ly vang

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 ly nang xa hoi. hieu ve ((cac bac) OR (cac cach)) van ((hang di) or (hang vi)) su triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so sach ly nang xa hoi. hieu ve ((cac bac) OR (cac cach)) van ((hang di) OR (hang vi)) su triet*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "so sach ly nang xa hoi. hieu ve ((cac bac) OR (cac cach)) van ((hang di) or (hang vi)) su triet*".