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"
"long bug code snippets" » "long cua code snippets", "long cuc code snippets", "long vu code snippets", "long 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: (((("long 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: (((("long bug code snippets") OR ("dung thuong code snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( long bug code snippets ) or ( dung thuong code snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("long bug code snippets") or ("dung thuong code snippets"))) or ("locating bug code snippets"))*.