Perhaps you should try some spelling variations:
va thanh » gia thanh, ban thanh, va tinh
cua viet » hoa viet, cua vat, cua dieu
hieu van » hieu va, thien van, lieu va
so sach » so sanh, bo sach, co sach
ca viet » va viet, co viet, hoa viet
va hanh » van hanh, va danh, ban hanh
van cac » van hac, van cau, van bac
y nang » ky nang, ly nang, v nang
cac tu » cac thu, cach tu, cac du
x hoi » xa hoi, o hoi, x ho

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