Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"dan ket doan snippets" » "dan ket hoa snippets", "dan le doan snippets", "dan ket van snippets", "dan ke doan snippets", "gan ket doan snippets", "van ket doan 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: (((("dan ket doan snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("dan ket doan snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( dan ket doan snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dan ket doan snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.