Perhaps you should try some spelling variations:
"coder coder uml complex problem" » "coder coder uml complex problems" (Expand search), "coder decoder uml complex problem" (Expand search), "code code uml complex problem" (Expand search), "decoder codec uml complex problem" (Expand search), "coder coder full complex problem" (Expand search), "coder coder uril complex problem" (Expand search), "coder coder sul complex 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 coder uml complex problem") OR ("api python python python programming"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"coder coder uml complex problem\") OR (\"api python python python programming\"))".
• Removing quotes may allow a broader search: (( coder coder uml complex problem ) OR ( api python python python programming )).
• Adding a wildcard symbol may retrieve word variants: (("coder coder uml complex problem") OR ("api python python python programming"))*.