For the past few hours, he'd been trying to guess what it could be, without success.

"I have been trying to reach him for almost three days now, without success."

He then tried his hand at real estate, without success.

She tried without success to read the expression on his face.

She tried to make her voice light, without much success.

The men tried again on January 17, also without success.

He tried, without much success, to keep his voice level.

I have been trying for a number of years, without much success.

But she tried to cut off her thoughts, without much success.

She was trying, without much success, to explain her cause to him.