Perhaps you should try some spelling variations:
"dung vinh cad snippets" » "dang vinh cad snippets", "dung ninh cad snippets", "quang vinh cad snippets", "dung trinh cad snippets", "dung tinh cao snippets", "dung dinh cac snippets"
"hang java java snippets" » "hang 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: (((("dung vinh cad 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 vinh cad snippets") OR ("hang java java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( dung vinh cad snippets ) or ( hang java java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dung vinh cad snippets") or ("hang java java snippets"))) or ("locating bug code snippets"))*.