Perhaps you should try some spelling variations:
"dung trung java snippets" » "dung trong java snippets", "quang trung java snippets", "truong trung java snippets", "dung trung va snippets", "dung trinh java snippets"
"locating bug core snippets" » "locating bug code snippets"
"dung co code snippets" » "dung cho code snippets", "dung cong code snippets", "dung cua code snippets", "dung cfd 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: (((("dung trung java snippets") or ("dung co code snippets"))) or ("locating bug core snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("dung trung java snippets") OR ("dung co code snippets"))) OR ("locating bug core snippets")).
• Removing quotes may allow a broader search: (((( dung trung java snippets ) or ( dung co code snippets ))) or ( locating bug core snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dung trung java snippets") or ("dung co code snippets"))) or ("locating bug core snippets"))*.