Perhaps you should try some spelling variations:
"coder coder in coverage problem" » "coder coder in covering problem" (Expand search), "coder coder in cover problem" (Expand search), "coder coder in covering problems" (Expand search), "coder decoder in coverage problem" (Expand search), "code code in coverage problem" (Expand search), "decoder codec in coverage problem" (Expand search), "coder coder and coverage problem" (Expand search), "coder code in coverage problem" (Expand search), "coder codes in coverage problem" (Expand search), "coder poder in coverage problem" (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 coder in coverage problem") OR ("api pythons python python programming"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"coder coder in coverage problem\") OR (\"api pythons python python programming\"))*".
• Removing quotes may allow a broader search: (( coder coder in coverage problem ) OR ( api pythons python python programming ))*.