Perhaps you should try some spelling variations:
"surgical sutures" » "surgical stress", "surgical failures", "surgical measures"
"surgical studies" » "survival studies", "serological studies", "clinical studies"
"surgical suites" » "surgical suite", "surgical site", "surgical systems"

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

• If you are trying to use Boolean operators, they must be ALL CAPS: (((("surgical sutures") OR ("surgical suites"))) OR ("surgical studies")).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((\"surgical sutures\") OR (\"surgical suites\"))) or (\"surgical studies\"))".
• Removing quotes may allow a broader search: (((( surgical sutures ) OR ( surgical suites ))) or ( surgical studies )).
• Adding a wildcard symbol may retrieve word variants: (((("surgical sutures") OR ("surgical suites"))) or ("surgical studies"))*.