Perhaps you should try some spelling variations:
"coder coder string matching problem" » "coder coder string packing problem" (Expand search), "coder coder string teaching problem" (Expand search), "coder coder string cutting problem" (Expand search), "coder cordel string matching problem" (Expand search), "coder closed string matching problem" (Expand search), "coder modelo string matching problem" (Expand search), "coder decoder string matching problem" (Expand search), "code code string matching problem" (Expand search), "decoder codec string matching 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 string matching problem\") OR (\"api python python python programming\"))~".
• Removing quotes may allow a broader search: (( coder coder string matching problem ) OR ( api python python python programming ))~.
• Adding a wildcard symbol may retrieve word variants: (("coder coder string matching problem") OR ("api python python python programming"))*.