They had been trying to contact her for several days.

But go ahead and try to contact him, if that'll make you feel better.

I tried to contact him but there was no response.

"Do you mean that they might have been trying to contact us?"

"What about after the fight, did you try to contact them on your way out?"

He thought several times over the years about trying to contact them.

Always the question was with him, whether to try to contact her or let go.

I tried to contact the company to ask questions, but they were not there.

I've been trying to contact you for more than six months.

I've been trying to contact her, in your name, for the last hour without success.