Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"khoa hai con snippets" » "khoa hoi con snippets", "khoa tai con snippets", "khoa bai con snippets", "khoa phai con snippets", "khoa hai son 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 hai con 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 hai con snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( khoa hai con snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("khoa hai con snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.