Perhaps you should try some spelling variations:
"descending colon" » "descending motor", "descending down", "descending coronary"
"descending chain" » "descending chains", "ascending chain", "descending pain"
"ascending colon" » "ascending chain", "ascending auction"

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