Perhaps you should try some spelling variations:
"coder string matching algorithms teaching" » "coder string matching algorithm teaching" (Expand search), "coder string mining algorithms teaching" (Expand search), "coder string tracking algorithms teaching" (Expand search), "cordel string matching algorithms teaching" (Expand search), "closed string matching algorithms teaching" (Expand search), "modelo string matching algorithms teaching" (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 string matching algorithms teaching") OR ("api pythons python python programming"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"coder string matching algorithms teaching\") OR (\"api pythons python python programming\"))*".
• Removing quotes may allow a broader search: (( coder string matching algorithms teaching ) OR ( api pythons python python programming ))*.