Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"duc con con snippets" » "duc cong con snippets", "duc ton con snippets", "duc cuong con snippets", "duc lon con snippets", "duc con co snippets", "duc con coi 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 con 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 con snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( duc con con snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("duc con con snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.