Perhaps you should try some spelling variations:
"dung thuong code snippets" » "hang thuong code snippets", "dung trong code snippets", "cong thuong code snippets", "dung thuong con snippets", "dung thuong de snippets", "dung thuong nobel snippets", "dung thuong code slippers"
"cong bug code snippets" » "cong dung code snippets", "cong hung code snippets", "cong bang code snippets", "cong bug code slippers"
"locating bug code snippets" » "locating bug code slippers"

Try widening your search to All Fields.

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