Perhaps you should try some spelling variations:
"dong san code snippets" » "cong san code snippets", "dong bang code snippets", "dong von code snippets", "dong san co snippets", "dong san cong snippets", "dong san code slippers"
"dung tin java snippets" » "dong tin java snippets", "luong tin java snippets", "dung tren java snippets", "dung trinh java snippets", "dung think java snippets", "dung tin va snippets", "dung tin java slippers"
"locating bug code snippets" » "locating bug code slippers", "locating bung code snippets", "locating bugs code 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 san code snippets") or ("dung tin java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("dong san code snippets") OR ("dung tin java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( dong san code snippets ) or ( dung tin java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dong san code snippets") or ("dung tin java snippets"))) or ("locating bug code snippets"))*.