Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"khoa dan so snippets" » "khoa dang so snippets", "hoa dan so snippets", "khoa can so snippets", "khoa dan soc snippets", "khoa dan su snippets", "khoa dan mo 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: (((("khoa dan so snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("khoa dan so snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( khoa dan so snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("khoa dan so snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.