Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"xuan toan de snippets" » "xuan toan du snippets", "xuan toan ke snippets", "xuan toan ve snippets", "quan toan de snippets", "luan toan de snippets", "xuat toan de 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 toan de 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 toan de snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( xuan toan de snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("xuan toan de snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.