Perhaps you should try some spelling variations:
su triet » su viet, su tien, ve triet
bo sach » co sach, hoc sach
nang xa » nang x, lang xa, nang ma
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 doi, hang dien, hang dich
hang vi » hanh vi, khang voi, hang tai
y nang » ky nang, ly nang, v nang
ve cac » va cac, vien cac

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

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