On a mobile it's under the drop-down menu at the top right (3 white horizontal bars). In a computer browser it disappears if you go narrower than about 975 pixels.
"this is a basic search function. When you search for a phrase every word will be searched individually. We will implement a function to find the exact phrase but this will be done at another time."
This and filters (e.g. by date range) are most definitely needed. Even SCS could filter, so I don't see why Magix could not.