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