Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"nam menh cua snippets" » "nam men cua snippets", "nam dinh cua snippets", "nam danh cua snippets", "nam manh cua snippets", "nam benh chua snippets", "nam mang cua 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: (((("nam menh cua snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("nam menh cua snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( nam menh cua snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("nam menh cua snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.