Perhaps you should try some spelling variations:
"coder coder linear dirac problem" » "coder coder linear direct problem" (Expand search), "coder code linear dirac problem" (Expand search), "coder order linear dirac problem" (Expand search), "coder model linear dirac problem" (Expand search), "coder coder linear dire problem" (Expand search), "coder coder linear direta problem" (Expand search), "coder decoder linear dirac problem" (Expand search), "code code linear dirac problem" (Expand search), "decoder codec linear dirac problem" (Expand search)
"api citons python python programming" » "api pitons python python programming" (Expand search), "api piton python python programming" (Expand search), "api pythons python python programming" (Expand search), "api citons pythons python programming" (Expand search), "api citons piton python programming" (Expand search), "api citons pitons python programming" (Expand search)

You may be able to get more results by adjusting your search query.

• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"coder coder linear dirac problem\") OR (\"api citons python python programming\"))~".
• Removing quotes may allow a broader search: (( coder coder linear dirac problem ) OR ( api citons python python programming ))~.
• Adding a wildcard symbol may retrieve word variants: (("coder coder linear dirac problem") OR ("api citons python python programming"))*.