Perhaps you should try some spelling variations:
"coder coder the perception properties" » "coder coder the permeation properties" (Expand search), "coder coder the percolation properties" (Expand search), "coder coder the sorption properties" (Expand search), "coder decoder the perception properties" (Expand search), "code code the perception properties" (Expand search), "decoder codec the perception properties" (Expand search), "coder code the perception properties" (Expand search), "coder cover the perception properties" (Expand search), "coder poder the perception properties" (Expand search)
"_ python python python programming" » "_ pythons python python programming" (Expand search), "_ piton python python programming" (Expand search), "_ pitons python python programming" (Expand search)

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

• Performing a fuzzy search may retrieve terms with similar spellings: (("coder coder the perception properties") OR ("_ python python python programming"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"coder coder the perception properties\") OR (\"_ python python python programming\"))".
• Removing quotes may allow a broader search: (( coder coder the perception properties ) OR ( _ python python python programming )).
• Adding a wildcard symbol may retrieve word variants: (("coder coder the perception properties") OR ("_ python python python programming"))*.