Perhaps you should try some spelling variations:
"hoang hanh cat snippets" » "hoang thanh cat snippets", "hoang anh cat snippets", "hoang xanh cat snippets", "hoang hanh cac snippets", "hoang hanh luat snippets", "hoang nhanh cay snippets"
"dung java java snippets" » "dung va java 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: (((("dung java java snippets") or ("hoang hanh cat snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("dung java java snippets") OR ("hoang hanh cat snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( dung java java snippets ) or ( hoang hanh cat snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dung java java snippets") or ("hoang hanh cat snippets"))) or ("locating bug code snippets"))*.