Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"dung du den snippets" » "dung de den snippets", "dung cu den snippets", "dung cua den snippets", "dung duy den snippets", "dung tu den snippets", "dung di den 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: (((("dung du den snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("dung du den snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( dung du den snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dung du den snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.