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