Sentence examples similar to may certainly exist from inspiring English sources

These households certainly exist and may be more likely to emerge following an adult AIDS death.

Although HIV infection risks may not be very high for young people as a whole, there certainly exist a group of youth who have unprotected sex and are vulnerable to HIV infection.

And they certainly exist.

Hurdles certainly exist.

Heat-loving extremophile bacteria certainly exist.

The opportunities – and the need – certainly exist.

"Though they are often arbitrary, disciplinary boundaries certainly exist.

Exceptions certainly exist, and things are changing for the better.

But theological differences certainly exist, and have to be managed.

Others mentioned within-country variations, which certainly exist.

There certainly exist what are called perfect obligations.