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