Perhaps you should try some spelling variations:
"coder coding string theory problems" » "coder coding string theory problem" (Expand search), "coder coding string their problems" (Expand search), "coder coding string therapy problems" (Expand search), "coder coding using theory problems" (Expand search), "coder sewing string theory problems" (Expand search), "coder comparing string theory problems" (Expand search), "coder coding nursing theory problems" (Expand search), "modern coding string theory problems" (Expand search), "color coding string theory problems" (Expand search), "odor coding string theory 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 coding string theory problems\") OR (\"api python python python programming\"))~".
• Removing quotes may allow a broader search: (( coder coding string theory problems ) OR ( api python python python programming ))~.
• Adding a wildcard symbol may retrieve word variants: (("coder coding string theory problems") OR ("api python python python programming"))*.