Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"vien cac noi snippets" » "vien bach noi snippets", "vien dai noi snippets", "vien da noi snippets", "vien cach noi snippets", "vien cac toi snippets", "vien cau noi 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: (((("vien cac noi snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("vien cac noi snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( vien cac noi snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("vien cac noi snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.