Remove text on event when is unreadable?

it’s possible to remove text on the event box when the text is unreadable?
In the situation of the photo, when there is a lot of events and text is not complete.
There is a way, when text in box is not complete to leave empty?

Attach Image:

probably the simplest way would be to set overflow hidden for event elements:

.dhx_cal_event{ overflow: hidden; }

I try, but it doesn’t work, there is also the text incompleted