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