Perhaps you should try some spelling variations:
"dung heng code snippets" » "dung hong code snippets", "dung hung code snippets", "dung chung code snippets", "dung chong code snippets", "dung heng core snippets", "dung heng code slippers"
"dung he code snippets" » "dung cho code snippets", "dung he core snippets", "dung he code slippers"
"locating bug code snippets" » "locating bug core 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 heng code snippets") or ("dung he code snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("dung heng code snippets") OR ("dung he code snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( dung heng code snippets ) or ( dung he code snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dung heng code snippets") or ("dung he code snippets"))) or ("locating bug code snippets"))*.