As the years pass, the search for people like this has become more urgent.

The long search would become longer still, and there was no helping it.

In this way, the search has become more challenging.

She began to wonder if this search wasn't becoming foolhardy.

The search for a place to have dinner can become so absorbing, indeed, that there is a danger you will never leave the room.

As the war dragged on and the country was emptied of resources, the search for food became a struggle all its own.

The search for work has become difficult, particularly for young people.

The search for the vanished bus had become very feeble.

In a recent interview, he discussed why the search has become so difficult - and what it means.

He had begun to wonder himself if the search was becoming more dangerous.