Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"phan luat da snippets" » "phap luat da snippets", "phan xuat da snippets", "phan lap da snippets", "phan luat dat snippets", "phan luat dan snippets", "phan luat dau 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 luat da 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 luat da snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( phan luat da snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("phan luat da snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.