Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"kai van hoan snippets" » "kai van hoang snippets", "kai van hoa snippets", "kai van toan snippets", "hai van hoan snippets", "mai van hoan snippets", "lai van hoan 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: (((("kai van hoan snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("kai van hoan snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( kai van hoan snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("kai van hoan snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.