Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"phan quoc lo snippets" » "han quoc lo snippets", "tran quoc lo snippets", "toan quoc lo snippets", "phan quoc co snippets", "phan quoc o snippets", "phan quoc so 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 quoc lo 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 quoc lo snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( phan quoc lo snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("phan quoc lo snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.