Perhaps you should try some spelling variations:
"ascending auction" » "ascending infection", "ascending aortic"
"descending chain" » "descending chains", "ascending chain", "descending pain"
"ascending colon" » "ascending chain"

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: (("descending chain") OR ((("ascending colon") OR ("ascending auction")))).
• Removing quotes may allow a broader search: (( descending chain ) or ((( ascending colon ) or ( ascending auction )))).
• Adding a wildcard symbol may retrieve word variants: (("descending chain") or ((("ascending colon") or ("ascending auction"))))*.