Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"duc con dep snippets" » "duc cong dep snippets", "duc ton dep snippets", "duc cuong dep snippets", "duc con de snippets", "duc don dep snippets", "duc canh dep snippets"
"locating bug code snippets" » "locating bung code snippets", "locating bugs code snippets", "locating bug core snippets"

Try widening your search to All Fields.

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

• Performing a fuzzy search may retrieve terms with similar spellings: (((("duc con dep snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("duc con dep snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( duc con dep snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("duc con dep snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.