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