Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"duc hoan ve snippets" » "duc hoang ve snippets", "duc hoa ve snippets", "duc toan ve snippets", "duc hoai ve snippets", "duc hoan va 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: (((("duc hoan ve snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("duc hoan ve snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( duc hoan ve snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("duc hoan ve snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.