Hello,
Yes, using Keystrokes command (Ctrl+f) you can find and highlight particular text or phrase in an open webpage.
If you have Automation Anywhere Premier version, you can also use Manage Windows Controls (MWC) directly. MWC allows you to directly access Windows UI objects like Text Box, Drop Down, List Box, Radio buttons and more. When you use MWC, not only your task is independent of screen coordinates and screen resolution, but it can also run in background.
Please find demo on Manage Windows Control (MWC) at,
http://www.tethyssolutions.com/MWC_Demo.html
Hope that helps.