Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"luan nang da snippets" » "luan van da snippets", "van nang da snippets", "luan san da snippets", "luan nang dau snippets", "luan nang dua snippets", "luan nang dan 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: (((("luan nang 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: (((("luan nang da snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( luan nang da snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("luan nang da snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.