Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"pha van do snippets" » "pham van do snippets", "phan van do snippets", "phap van do snippets", "pha van dao snippets", "pha van de snippets", "pha 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: (((("pha 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: (((("pha van do snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( pha van do snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("pha van do snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.