Perhaps you should try some spelling variations:
"dung cua cac snippets" » "dung luan cac snippets", "dung cho cac snippets", "dung coa cac snippets", "dung choa cac snippets", "chung cua cac snippets"
"dung cu code snippets" » "dung co code snippets", "dung cho code snippets", "chung cu code snippets", "dung cfd code snippets"
"locating bug code 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 cua cac snippets") or ("dung cu code snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("dung cua cac snippets") OR ("dung cu code snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( dung cua cac snippets ) or ( dung cu code snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dung cua cac snippets") or ("dung cu code snippets"))) or ("locating bug code snippets"))*.