Perhaps you should try some spelling variations:
"_ convolutional code tracing problems" » "_ convolutional codes tracing problems" (Expand search), "_ convolutional and tracing problems" (Expand search), "_ convolucional cnn tracing problems" (Expand search), "_ convolutional code tracking problems" (Expand search), "_ convolutional code tracing problem" (Expand search), "_ convolutional code teaching problems" (Expand search), "_ convolutional cone tracing problems" (Expand search), "_ convolutional model tracing problems" (Expand search)
"active replication python python programming" » "machine replication python python programming" (Expand search), "partial replication python python programming" (Expand search), "active radiation python python programming" (Expand search), "active replication method python programming" (Expand search), "active replication within python programming" (Expand search), "active replication protein python programming" (Expand search), "active replication pythons python programming" (Expand search), "active replication piton python programming" (Expand search), "active replication 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: "((\"_ convolutional code tracing problems\") OR (\"active replication python python programming\"))~".
• Removing quotes may allow a broader search: (( _ convolutional code tracing problems ) OR ( active replication python python programming ))~.
• Adding a wildcard symbol may retrieve word variants: (("_ convolutional code tracing problems") OR ("active replication python python programming"))*.