Perhaps you should try some spelling variations:
"coder equation _ string program" » "order equation _ string program" (Expand search), "model equation _ string program" (Expand search), "tozer equation _ string program" (Expand search), "coder equation _ strong program" (Expand search), "coder equation _ spring programa" (Expand search), "coder equation _ sharing program" (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 equation _ string program\") OR (\"api python python python programming\"))~".
• Removing quotes may allow a broader search: (( coder equation _ string program ) OR ( api python python python programming ))~.
• Adding a wildcard symbol may retrieve word variants: (("coder equation _ string program") OR ("api python python python programming"))*.