Perhaps you should try some spelling variations:
"dang quang code snippets" » "dung quang code snippets", "nang quan code snippets", "dang hung code snippets", "dang quang de snippets", "dang quang code slippers"
"dung lieu data snippets" » "dung hieu data snippets", "dung tieu data snippets", "dung viet data snippets", "dung lieu dao snippets", "dung bieu dat snippets", "dung lieu da snippets", "dung lieu data slippers"
"locating bug code snippets" » "locating bug code slippers", "locating bung code snippets", "locating bugs code snippets"

Try widening your search to All Fields.

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