Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"nam huy toan snippets" » "nam huy tran snippets", "nam huu toan snippets", "nam huy hoang snippets", "nam hue toan snippets", "nam huh toan snippets", "nam huyen toan 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 huy toan 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 huy toan snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( nam huy toan snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("nam huy toan snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.