Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"phan dai son snippets" » "phan dau son snippets", "phan day son snippets", "phan loai son snippets", "phan dai so snippets", "phan doi song snippets", "phan thai son 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 dai son 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 dai son snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( phan dai son snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("phan dai son snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.