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