Perhaps you should try some spelling variations:
"spreading infection" » "spreading innovations", "spreading simulation"
"ascending infection" » "ascending connections", "setting infection", "ascending projections"
"ascending auction" » "ascending aortic", "ascending colon"

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: (("ascending auction") OR ((("ascending infection") OR ("spreading infection")))).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"ascending auction\") or (((\"ascending infection\") OR (\"spreading infection\"))))".
• Removing quotes may allow a broader search: (( ascending auction ) or ((( ascending infection ) OR ( spreading infection )))).
• Adding a wildcard symbol may retrieve word variants: (("ascending auction") or ((("ascending infection") OR ("spreading infection"))))*.