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