Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"nam danh di snippets" » "nam dinh di snippets", "nam dan di snippets", "nam danh du snippets", "nam xanh di snippets", "nam danh dien 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 danh di 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 danh di snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( nam danh di snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("nam danh di snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.