Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"nhan cua de snippets" » "nhat cua de snippets", "nhan luc de snippets", "nhan su de snippets", "nhan cua te snippets", "nhan cua du snippets", "nhan cua he 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: (((("nhan cua 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: (((("nhan cua de snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( nhan cua de snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("nhan cua de snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.