Perhaps you should try some spelling variations:
"dung trinh chiu snippets" » "dung tinh chiu snippets", "dong trinh chiu snippets", "cong trinh chiu snippets", "dung trinh chu snippets", "dung trinh chi snippets", "dung trinh chinh 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 chiu 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 chiu snippets") OR ("dung java java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( dung trinh chiu snippets ) or ( dung java java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dung trinh chiu snippets") or ("dung java java snippets"))) or ("locating bug code snippets"))*.