Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"doan va den snippets" » "doan va dien snippets", "doan van den snippets", "doan va de snippets", "doanh va den snippets", "dan va den snippets", "toan va den 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: (((("doan va den snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("doan va den snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( doan va den snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("doan va den snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.