How to add a selection condition?

Question

JavaScript

Good day.
The code below selects news from the collection by username.
How to supplement the selection condition also by the user's last name?
It should be taken into account that the surname is not indicated for all users, i.e. somewhere it simply can not be!
Condition: если req.body.nameor req.body.surnamefound in b.d.

News.find({ name: req.body.name })
 .select()
 .exec()
 .then(dev => {
   if (dev.length >= 1) {     
        res.status(200).json({
             "result":"ok"
       	});
   }
 });