Perhaps you should try some spelling variations:
"coder java compiler optimization problems" » "coder java compiler optimizations problems" (Expand search), "coder java combined optimization problems" (Expand search), "coder java spider optimization problems" (Expand search), "coder java computer optimization problems" (Expand search), "coder aad compiler optimization problems" (Expand search), "coder cuda compiler optimization problems" (Expand search), "codes java compiler optimization problems" (Expand search), "xcode java compiler optimization 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)

You may be able to get more results by adjusting your search query.

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