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

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

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