Perhaps you should try some spelling variations:
"coder string matching algorithms friction" » "coder string matching algorithm friction" (Expand search), "coder string matching algorithms functional" (Expand search), "coder string matching algorithms selection" (Expand search), "coder string mining algorithms friction" (Expand search), "coder string tracking algorithms friction" (Expand search), "cordel string matching algorithms friction" (Expand search), "closed string matching algorithms friction" (Expand search), "modelo string matching algorithms friction" (Expand search)
"api pitons python python programming" » "api pitons pythons python programming" (Expand search), "api pitons piton python programming" (Expand search), "api pitons pytm python programming" (Expand search), "api citons python python programming" (Expand search), "api pitoni python python programming" (Expand search), "api pitoes 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 string matching algorithms friction") OR ("api pitons python python programming"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"coder string matching algorithms friction\") OR (\"api pitons python python programming\"))".
• Removing quotes may allow a broader search: (( coder string matching algorithms friction ) OR ( api pitons python python programming )).
• Adding a wildcard symbol may retrieve word variants: (("coder string matching algorithms friction") OR ("api pitons python python programming"))*.