Perhaps you should try some spelling variations:
"coder coder upon optimization problem" » "coder coder upon optimization problems" (Expand search), "coder coder on optimization problem" (Expand search), "coder coder open optimization problem" (Expand search), "coder coder fusion optimization problem" (Expand search), "coder decoder upon optimization problem" (Expand search), "code code upon optimization problem" (Expand search), "decoder codec upon optimization problem" (Expand search), "coder copper upon optimization problem" (Expand search), "coder power upon 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)

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 upon optimization problem") OR ("api python python python programming"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"coder coder upon optimization problem\") OR (\"api python python python programming\"))".
• Removing quotes may allow a broader search: (( coder coder upon optimization problem ) OR ( api python python python programming )).
• Adding a wildcard symbol may retrieve word variants: (("coder coder upon optimization problem") OR ("api python python python programming"))*.