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

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