Perhaps you should try some spelling variations:
"code code self sampling problems" » "code code self sampling process" (Expand search), "code code self mapping problems" (Expand search), "code code self scaling problems" (Expand search), "code code of sampling problems" (Expand search), "code cdc self sampling problems" (Expand search), "code code smell sampling problems" (Expand search), "code code set sampling 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), "manim python python python programming" (Expand search)

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: (("code code self sampling problems") OR ("api python python python programming"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"code code self sampling problems\") OR (\"api python python python programming\"))".
• Removing quotes may allow a broader search: (( code code self sampling problems ) OR ( api python python python programming )).
• Adding a wildcard symbol may retrieve word variants: (("code code self sampling problems") OR ("api python python python programming"))*.