Perhaps you should try some spelling variations:
cua viet » ca viet, hoa viet, cua vat
va cham » va chat, va tham
banh di » danh di, xanh di, banh chi
va banh » va ban, va danh, va hanh
quoc va » nuoc va, duoc va, quoc gia
di cua » dai cua, doi cua, de cua
tu dan » tuc dan, tu ban, cu dan
dan ky » van ky
va cam » va cac, va cao, va cai
x hoi » o hoi, x ho, 5 hoi

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu dan ky nang ((x hoi) OR (xa hoi)). hieu ((va cam) or (va cham)) quoc va banh di cua viet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu dan ky nang ((x hoi) OR (xa hoi)). hieu ((va cam) OR (va cham)) quoc va banh di cua viet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu dan ky nang ((x hoi) OR (xa hoi)). hieu ((va cam) or (va cham)) quoc va banh di cua viet".
• Adding a wildcard symbol may retrieve word variants: tu dan ky nang ((x hoi) OR (xa hoi)). hieu ((va cam) or (va cham)) quoc va banh di cua viet*.