Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"dan duy dot snippets" » "van duy dot snippets", "dan quy dot snippets", "dao duy dot snippets", "dan duy doc snippets", "dan duy dong 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: (((("dan duy dot snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("dan duy dot snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( dan duy dot snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dan duy dot snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.