Perhaps you should try some spelling variations:
"dung danh phap snippets" » "dung doanh phap snippets", "dung dan phap snippets", "dung dang phap snippets", "dung dinh phap snippets", "dung ban phap snippets", "dung danh nhan snippets", "dung danh phap slippers"
"hang java java snippets" » "hang va java snippets", "hang java java slippers"
"locating bug code snippets" » "locating bug code slippers", "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: (((("dung danh phap snippets") or ("hang java java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("dung danh phap snippets") OR ("hang java java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( dung danh phap snippets ) or ( hang java java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dung danh phap snippets") or ("hang java java snippets"))) or ("locating bug code snippets"))*.