Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"toan va den snippets" » "doan va den snippets", "tran van den snippets", "toan ban den snippets", "toan va dien snippets", "toan van den snippets", "toan va de 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: (((("toan 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: (((("toan va den snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( toan va den snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("toan va den snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.