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