Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"nam thanh he snippets" » "pham thanh he snippets", "ban thanh he snippets", "tai thanh he snippets", "nam thanh hue snippets", "nam thanh ha snippets", "nam thanh ve 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 thanh he 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 thanh he snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( nam thanh he snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("nam thanh he snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.