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