Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"tang xuan du snippets" » "tang luan du snippets", "tang quan du snippets", "dang xuan du snippets", "tang xuan duc snippets", "tang xuan huy snippets", "tang xuan thu 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: (((("tang xuan du snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("tang xuan du snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( tang xuan du snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("tang xuan du snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.