Perhaps you should try some spelling variations:
"coder loading and complexity index" » "coder loading and complexity and" (Expand search), "coder loading and complexity in" (Expand search), "mode loading and complexity index" (Expand search), "under loading and complexity index" (Expand search), "cone loading and complexity index" (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.

• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"coder loading and complexity index\") OR (\"_ python python python programming\"))~".
• Removing quotes may allow a broader search: (( coder loading and complexity index ) OR ( _ python python python programming ))~.
• Adding a wildcard symbol may retrieve word variants: (("coder loading and complexity index") OR ("_ python python python programming"))*.