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