Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"khoa thu du snippets" » "khoa than du snippets", "hoai thu du snippets", "ho thu du snippets", "khoa thu duc snippets", "khoa thu dau snippets", "khoa thuc du 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 thu du 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 thu du snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( khoa thu du snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("khoa thu du snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.