Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"xuan nam da snippets" » "quang nam da snippets", "xuan nang da snippets", "xuan nhan da snippets", "xuan nam dan snippets", "xuan nam a snippets", "xuan 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: (((("xuan 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: (((("xuan nam da snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( xuan nam da snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("xuan nam da snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.