Perhaps you should try some spelling variations:
"duong manh java snippets" » "duong van java snippets", "duong manh va snippets", "duong manh java slippers"
"dung von code snippets" » "dong von code snippets", "dung cong code snippets", "dung va code snippets", "dung von cong snippets", "dung von code 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: (((("duong manh java snippets") or ("dung von code snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("duong manh java snippets") OR ("dung von code snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( duong manh java snippets ) or ( dung von code snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("duong manh java snippets") or ("dung von code snippets"))) or ("locating bug code snippets"))*.