Perhaps you should try some spelling variations:
"coder decoder coding lpc problem" » "coder decoder codecs lpc problem" (Expand search), "coder decoder using lpc problem" (Expand search), "coder decoder codec lpc problem" (Expand search), "encoder decoder coding lpc problem" (Expand search), "coder decoder coding mpcc problem" (Expand search), "coder decoder coding arc problem" (Expand search), "coder decoder coding evcc problem" (Expand search), "coder decoder coding vvc 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), "rpa python python 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 decoder coding lpc problem\") OR (\"api python python python programming\"))~".
• Removing quotes may allow a broader search: (( coder decoder coding lpc problem ) OR ( api python python python programming ))~.
• Adding a wildcard symbol may retrieve word variants: (("coder decoder coding lpc problem") OR ("api python python python programming"))*.