Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"duc benh tre snippets" » "duoc benh tre snippets", "cuc benh tre snippets", "doc benh tre snippets", "duc ben tre snippets", "duc benh theo snippets", "duc benh tai 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 benh tre 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 benh tre snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( duc benh tre snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("duc benh tre snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.