Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"pham noi so snippets" » "pham doi so snippets", "pham moi so snippets", "pham voi so snippets", "pham noi bo snippets", "pham noi co 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: (((("pham noi so snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("pham noi so snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( pham noi so snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("pham noi so snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.