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