Perhaps you should try some spelling variations:
"coder coder math optimization problem" » "coder coder math optimization problems" (Expand search), "coder coder path optimization problem" (Expand search), "coder coder batch optimization problem" (Expand search), "coder coder with optimization problem" (Expand search), "coder decoder math optimization problem" (Expand search), "code code math optimization problem" (Expand search), "decoder codec math optimization problem" (Expand search), "coder modern math optimization 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 coder math optimization problem\") OR (\"api python python python programming\"))~".
• Removing quotes may allow a broader search: (( coder coder math optimization problem ) OR ( api python python python programming ))~.
• Adding a wildcard symbol may retrieve word variants: (("coder coder math optimization problem") OR ("api python python python programming"))*.