emc allows you to find words or phrases within the SmPC document text.
  1. Next to the main search box, click on advanced search
  2. In the left-hand menu, select the option 'By word or phrase'
  3. Type your search terms into the appropriate search boxes
  4. Make sure that the 'search full document' box is ticked

If you want to search for a word or phrase in a specific section of an SmPC, this can also be done on the advanced search page, using the left-hand menu called 'By SmPC section'.