Perhaps you should try some spelling variations:
"data using data snippets" » "data using java snippets", "data using sat snippets", "data missing data snippets", "data using data slippers"
"dung cac khau snippets" » "luong cac khau snippets", "dung cho khau snippets", "dung tai khau snippets", "dung cau khau snippets", "dung cac khu snippets", "dung cac khoan snippets", "dung cac khau slippers"
"locating bug code snippets" » "locating bug code slippers", "locating bung code snippets", "locating bugs code snippets", "locating bug core snippets"

Try widening your search to All Fields.

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• Performing a fuzzy search may retrieve terms with similar spellings: (((("data using data snippets") or ("dung cac khau snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("data using data snippets") OR ("dung cac khau snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( data using data snippets ) or ( dung cac khau snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("data using data snippets") or ("dung cac khau snippets"))) or ("locating bug code snippets"))*.