Till Adobe Acrobat 9 it was possible to jump between search results by using the up/down keyboard arrow keys (as described by this user too mentioning the Adobe 8 help: https://acrobatusers.com/forum/general-acrobat-topics/scrolling-through-search-instances/).
Now in Adobe Acrobat DC that seems not possible anymore, I need to directly click with the mouse/touchpad on the search result I want to show (as described here https://helpx.adobe.com/acrobat/using/searching-pdfs.html#review_and_save_pdf_search_resul ts).
I've also tried the keyboard shortcut "fn + F3" option (on Mac OS X) to move down to the next search result but, even tough the highlighted result moves to the next one, the page is not shown till I click with the mouse on it (if I simply press enter the PDF moves to the next page and not to the search result highlighted).
Is it possible to somehow get back to the Adobe Acrobat 8/9 behavior?
I wish I could answer this, because I'm having a similar problem. On my PC, the keyboard arrows work to navigate between search results, but only when I'm not connected remotely via RDP. When I use RDP to connect remotely to a machine, the arrows don't work. So the problem isn't that the arrows don't work at all. It seems that the problem is the arrows don't work in some instances (Mac OS X, RDP) but do work in other instances (Win 7 without RDP).