Perhaps you should try some spelling variations:
"coder _ mapping algorithms in" » "coder _ making algorithms in" (Expand search), "coder _ matching algorithms in" (Expand search), "coder _ mining algorithms in" (Expand search), "coder _ mapping algorithms and" (Expand search), "coder _ mapping algorithms _" (Expand search)
"api pythons python python programming" » "api pitons python python programming" (Expand search), "api piton python python programming" (Expand search), "api pythons piton python programming" (Expand search), "api pythons pitons python programming" (Expand search), "api pythons pytm python programming" (Expand search), "api python 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 _ mapping algorithms in") OR ("api pythons python python programming"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"coder _ mapping algorithms in\") OR (\"api pythons python python programming\"))".
• Removing quotes may allow a broader search: (( coder _ mapping algorithms in ) OR ( api pythons python python programming )).
• Adding a wildcard symbol may retrieve word variants: (("coder _ mapping algorithms in") OR ("api pythons python python programming"))*.