Perhaps you should try some spelling variations:
hospital based » hospital bed (Expand Search)
based clinical » goed clinical (Expand Search), based mechanical (Expand Search)
porto ralegre » porto alegre (Expand Search)
hospital 19 » hospital _ (Expand Search), hospital usm (Expand Search), hospital bed (Expand Search)
19 clinical » _ clinical (Expand Search), a clinical (Expand Search), 19 critical (Expand Search)
clinical de » clinical _ (Expand Search), clinical grade (Expand Search), clinical care (Expand Search)
de porto » _ porto (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 19 clinical de porto ralegre ) OR ( hospital based clinical de porto ralegre ))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "(( hospital 19 clinical de porto ralegre ) OR ( hospital based clinical de porto ralegre ))".
• Adding a wildcard symbol may retrieve word variants: (( hospital 19 clinical de porto ralegre ) OR ( hospital based clinical de porto ralegre ))*.