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