Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"khai tuan de snippets" » "hai quan de snippets", "khai thac de snippets", "khau luan de snippets", "khai tuan le snippets", "khai luan de snippets", "khai toan de 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: (((("khai tuan de snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("khai tuan de snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( khai tuan de snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("khai tuan de snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.