Perhaps you should try some spelling variations:
"dung dung cong snippets" » "duong dung cong snippets", "ung dung cong snippets", "dung ung cong snippets", "dung dung trong snippets"
"chan dan code snippets" » "chan doan code snippets", "chan dang code snippets", "nhan dan code snippets", "chan dan de snippets"
"locating bug code snippets" » "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: (((("chan dan code snippets") or ("dung dung cong snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("chan dan code snippets") OR ("dung dung cong snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( chan dan code snippets ) or ( dung dung cong snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("chan dan code snippets") or ("dung dung cong snippets"))) or ("locating bug code snippets"))*.