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