Perhaps you should try some spelling variations:
"coder linear precoding some problems" » "coder linear precoding scheme problems" (Expand search), "coder linear reading some problems" (Expand search), "coder linear precoding the problems" (Expand search), "code linear precoding some problems" (Expand search), "order linear precoding some problems" (Expand search), "model linear precoding some problems" (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 linear precoding some problems\") OR (\"api python python python programming\"))~".
• Removing quotes may allow a broader search: (( coder linear precoding some problems ) OR ( api python python python programming ))~.
• Adding a wildcard symbol may retrieve word variants: (("coder linear precoding some problems") OR ("api python python python programming"))*.