Perhaps you should try some spelling variations:
"coder decoder using routing problem" » "encoder decoder using routing problem" (Expand search), "coder disorder using routing problem" (Expand search), "coder decoding using routing problem" (Expand search), "coder cover using routing problem" (Expand search), "coder decoder using routine problem" (Expand search), "coder decoder nursing routing problem" (Expand search), "coder decoder using rotating 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.

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