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