Perhaps you should try some spelling variations:
"coder coder string cluster sampling" » "coder coder merging cluster sampling" (Expand search), "coder coder varying cluster sampling" (Expand search), "coder coder using cluster sampling" (Expand search), "coder cordel string cluster sampling" (Expand search), "coder closed string cluster sampling" (Expand search), "coder modelo string cluster sampling" (Expand search), "coder decoder string cluster sampling" (Expand search), "code code string cluster sampling" (Expand search), "decoder codec string cluster sampling" (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.

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