If the aircraft had really been tracked close to its last position, we should have found something yesterday.
Sadly, no.
We have this collective "CSI syndrome" that due to technology, "find my iPhone" and TV, we expect everything to happen in an instant.
But real life search can be a very difficult task -- especially underwater -- even with the best of information. There have been wreckage found only after extensive searching at the same exact area for months.
Fortunately (or unfortunately) the Indonesians are very good at methodically finding and recovering wreckage, given the amount of experience they have in major accident investigations over the years.