Perhaps you should try some spelling variations:
clinical course » clinical mouse (Expand Search), clinical case (Expand Search), clinical cost (Expand Search)
clinical care » clinical case (Expand Search), critical care (Expand Search), clinical grade (Expand Search)
hospital md » hospital bed (Expand Search), hospital _ (Expand Search), hospital usm (Expand Search)
porto » port (Expand Search), ports (Expand Search), porta (Expand Search)
alegre* » dalegre* (Expand Search), ralegre* (Expand Search)

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: hospital md ((clinical care) OR (clinical course)) porto alegre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hospital md ((clinical care) OR (clinical course)) porto alegre*".