Perhaps you should try some spelling variations:
"code of python routing problems" » "code of python routing problem" (Expand search), "code of python solving problems" (Expand search), "code of python packing problems" (Expand search), "code of python coding problems" (Expand search), "code of symphony routing problems" (Expand search), "code _ python routing problems" (Expand search), "code in python routing 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 of python routing problems") OR ("api python python python programming"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"code of python routing problems\") OR (\"api python python python programming\"))*".
• Removing quotes may allow a broader search: (( code of python routing problems ) OR ( api python python python programming ))*.