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