Perhaps you should try some spelling variations:
"trinh hanh cat snippets" » "trinh thanh cat snippets", "trinh han cat snippets", "trinh anh cat snippets", "trinh hanh cac snippets", "trinh hanh luat snippets", "trinh 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: (((("trinh 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: (((("trinh hanh cat snippets") OR ("dung java java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( trinh hanh cat snippets ) or ( dung java java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("trinh hanh cat snippets") or ("dung java java snippets"))) or ("locating bug code snippets"))*.