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