Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"vat duoi den snippets" » "vat duoc den snippets", "vat nuoi den snippets", "vat doi den snippets", "vat duoc dien snippets", "vat cuoi dan snippets", "vat di 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: (((("vat duoi 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 duoi den snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( vat duoi den snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("vat duoi den snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.