From what I understand, China and Vietnam have been working fairly hard to find the missing aircraft. Vietnam has been searching pretty hard along its coasts and China has deployed 10 satellites to look over the area. I think Malaysia isn't cooperating very well with other countries though since noone seems to know where to look for the missing aircraft with Vietnam even getting fed up and quitting S&R efforts until they get better information.
I think its time other countries send more planes and helicopters to find it. I know it costs money but take it out of the international donations that a lot of countries like Australia give.