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