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