difficult problem

An easy answer to a difficult problem is at hand.

You are then left with the most difficult problem of all.

At certain times in their development young people will face particularly difficult problems.

Indeed we seem to have a difficult problem upon our hands.

Particularly when he had a difficult problem like this one.

This is a very difficult problem for the police to deal with.

What looks very simple, is in fact a difficult problem.

This is a difficult problem and an active area of medical research.

"It was a very difficult problem in trying to raise the attention of the right people."

"But we're still in the middle of a difficult problem."

Medicare, they point out, is a different and more difficult problem.

But the most difficult problems now, a full year later, have been the practical ones.

He had always been able to find solutions to even the most difficult problems.

Making contact with the families in the first instance was the most difficult problem.

They seemed like two important people discussing a difficult problem.

So it's a difficult problem where you set the limits.

It's a very difficult problem in how we produce it.

There are many extremely difficult problems involved and I have less than a year left to work on them.

"We resolve in our life more difficult problems than this one."

Older children sometimes face more difficult problems with others' reactions.

And it's a very difficult problem to explain, but I'll try.

You and I know that solutions to difficult problems don't just happen.

We know better than to throw a difficult problem at a man with an established name!

I will try to explain this difficult problem so that the board can get an idea of it.

"Just because these are difficult problems, though, doesn't mean we shouldn't address them."