Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"phan lac son snippets" » "phan lap son snippets", "phan cac son snippets", "phan lan son snippets", "phan lam son snippets", "phan bac son snippets", "phan luc 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 lac 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 lac son snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( phan lac son snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("phan lac son snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.