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