Perhaps you should try some spelling variations:
"coder coder konwerter stefan problem" » "coder coder kongeter stefan problem" (Expand search), "coder coder koerber stefan problem" (Expand search), "coder coder konwerter salesman problem" (Expand search), "coder decoder konwerter stefan problem" (Expand search), "code code konwerter stefan problem" (Expand search), "decoder codec konwerter stefan problem" (Expand search)
"api python python python programming" » "api pythons python python programming" (Expand search), "api piton python python programming" (Expand search), "api 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 konwerter stefan problem") OR ("api python python python programming"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"coder coder konwerter stefan problem\") OR (\"api python python python programming\"))".
• Removing quotes may allow a broader search: (( coder coder konwerter stefan problem ) OR ( api python python python programming )).
• Adding a wildcard symbol may retrieve word variants: (("coder coder konwerter stefan problem") OR ("api python python python programming"))*.