Perhaps you should try some spelling variations:
"coder code using undersampling problem" » "coder code and undersampling problem" (Expand search), "code code using undersampling problem" (Expand search), "modern code using undersampling problem" (Expand search), "color code using undersampling problem" (Expand search), "coder made using undersampling problem" (Expand search), "coder coding using undersampling problem" (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 code using undersampling problem\") OR (\"api python python python programming\"))~".
• Removing quotes may allow a broader search: (( coder code using undersampling problem ) OR ( api python python python programming ))~.
• Adding a wildcard symbol may retrieve word variants: (("coder code using undersampling problem") OR ("api python python python programming"))*.