Perhaps you should try some spelling variations:
"_ convolutional code tracing problem" » "_ convolutional codes tracing problem" (Expand search), "_ convolutional and tracing problem" (Expand search), "_ convolucional cnn tracing problem" (Expand search), "_ convolutional code tracking problem" (Expand search), "_ convolutional code tracking problems" (Expand search), "_ convolutional code teaching problem" (Expand search), "_ convolutional cone tracing problem" (Expand search), "_ convolutional model tracing problem" (Expand search)
"active application python python programming" » "active replication python python programming" (Expand search), "activity application python python programming" (Expand search), "native applications python python programming" (Expand search), "active application method python programming" (Expand search), "active aplicativo python python programming" (Expand search), "active application methods python programming" (Expand search), "active application pythons python programming" (Expand search), "active application piton python programming" (Expand search), "active application pitons 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: (("_ convolutional code tracing problem") OR ("active application python python programming"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"_ convolutional code tracing problem\") OR (\"active application python python programming\"))*".
• Removing quotes may allow a broader search: (( _ convolutional code tracing problem ) OR ( active application python python programming ))*.