Perhaps you should try some spelling variations:
"decoder implementation based tracking problem" » "code implementation based tracking problem" (Expand search), "model implementation based tracking problem" (Expand search), "record implementation based tracking problem" (Expand search), "decoder implementation and tracking problem" (Expand search), "decoder implementation issues tracking problem" (Expand search), "decoder implementation at tracking problem" (Expand search), "decoder implementation based tracking problems" (Expand search), "decoder implementation based packing problem" (Expand search), "decoder implementation based teaching problem" (Expand search), "decoder implementation based training problem" (Expand search)
"python coding python python programming" » "action coding python python programming" (Expand search), "python code python python programming" (Expand search), "python codigo python python programming" (Expand search), "python codigos python python programming" (Expand search), "python using python python programming" (Expand search), "python coding pythons python programming" (Expand search), "python coding piton python programming" (Expand search), "python coding 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: "((\"decoder implementation based tracking problem\") OR (\"python coding python python programming\"))~".
• Removing quotes may allow a broader search: (( decoder implementation based tracking problem ) OR ( python coding python python programming ))~.
• Adding a wildcard symbol may retrieve word variants: (("decoder implementation based tracking problem") OR ("python coding python python programming"))*.