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