Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"dan nam don snippets" » "van nam don snippets", "dong nam don snippets", "dinh nam don snippets", "dan nam dong snippets", "dan nam dan snippets", "dan nam do 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 nam don 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 nam don snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( dan nam don snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dan nam don snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.