Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"nam linh can snippets" » "nam dinh can snippets", "tam linh can snippets", "nam danh can snippets", "nam minh can snippets", "nam kinh can snippets", "nam lich can 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 linh can 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 linh can snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( nam linh can snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("nam linh can snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.