Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"doi giai cac snippets" » "loi giai cac snippets", "doi giam cac snippets", "doi ngoai cac snippets", "doi gian cac snippets", "doi giai ca snippets", "doi giai bai 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: (((("doi giai cac snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("doi giai cac snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( doi giai cac snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("doi giai cac snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.