Perhaps you should try some spelling variations:
"doi cong code snippets" » "doi cong cong snippets", "doi cong co snippets", "doi cong che snippets", "doi song code snippets", "noi cong code snippets", "moi cong code snippets", "doi cong code slippers"
"using low java snippets" » "using low java slippers"
"locating bug code snippets" » "locating bug code slippers", "locating bung code snippets", "locating bugs code snippets"

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

• If you are trying to use Boolean operators, they must be ALL CAPS: (((("doi cong code snippets") OR ("using low java snippets"))) OR ("locating bug code snippets"))~.
• Removing quotes may allow a broader search: (((( doi cong code snippets ) or ( using low java snippets ))) or ( locating bug code snippets ))~.
• Adding a wildcard symbol may retrieve word variants: (((("doi cong code snippets") or ("using low java snippets"))) or ("locating bug code snippets"))*.