Perhaps you should try some spelling variations:
"dung cacfd code snippets" » "dung cac code snippets", "dung cfd code snippets", "dung cacfd code slippers"
"thong tin code snippets" » "thong tin co snippets", "trong tin code snippets", "thong tin 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: (((("thong tin 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: (((("thong tin code snippets") OR ("dung cacfd code snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( thong tin code snippets ) or ( dung cacfd code snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("thong tin code snippets") or ("dung cacfd code snippets"))) or ("locating bug code snippets"))*.