Perhaps you should try some spelling variations:
hanh vai » hanh vi, hanh va, hanh tai
cua viet » ca viet, cua vat, cua dieu
so sach » so sanh, bo sach, co sach
nang xa » nang x, lang xa, nang ma
hieu ve » hieu va, hieu van
v nang » va nang, vu nang, van nang
ve cac » va cac, vien cac
sach v » sach va, sach y, sach 2
su va » su van, tu va
du va » dau va, tu va, vu va

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 v nang xa hoi. hieu ve cac ((du va) OR (su va)) hanh vai ((cua viet) or (hoa viet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so sach v nang xa hoi. hieu ve cac ((du va) OR (su va)) hanh vai ((cua viet) OR (hoa viet))*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "so sach v nang xa hoi. hieu ve cac ((du va) OR (su va)) hanh vai ((cua viet) or (hoa viet))*".