Perhaps you should try some spelling variations:
"dung cac co snippets" » "luong cac co snippets", "dung cho co snippets", "dung tai co snippets", "dung cac cong snippets"
"using 3 code snippets" » "using 3d code snippets", "using a code snippets", "using _ code snippets", "using 3 core snippets"
"locating bug code snippets" » "locating bug core 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: (((("dung cac co snippets") or ("using 3 code snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("dung cac co snippets") OR ("using 3 code snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( dung cac co snippets ) or ( using 3 code snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dung cac co snippets") or ("using 3 code snippets"))) or ("locating bug code snippets"))*.