Perhaps you should try some spelling variations:
"trung khoa code snippets" » "truong khoa code snippets", "trung hoa code snippets", "rung khoa code snippets", "trung khoa cong snippets", "trung khoa co snippets", "trung khoa de snippets", "trung khoa code slippers"
"dung java java snippets" » "dung va java snippets", "dung java java slippers"
"locating bug code snippets" » "locating bug code slippers", "locating bung code snippets", "locating bugs code 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: (((("trung khoa code snippets") or ("dung java java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("trung khoa code snippets") OR ("dung java java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( trung khoa code snippets ) or ( dung java java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("trung khoa code snippets") or ("dung java java snippets"))) or ("locating bug code snippets"))*.