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