Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"duc hoan vo snippets" » "duc hoang vo snippets", "duc hoa vo snippets", "duc toan vo snippets", "duc hoan va snippets", "duc toan von 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 vo 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 vo snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( duc hoan vo snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("duc hoan vo snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.