Perhaps you should try some spelling variations:
"dung phuong code snippets" » "dung thuong code snippets", "quang phuong code snippets", "bang phuong code snippets", "dung phuong de snippets", "dung phuong code slippers"
"pha cac code snippets" » "pha cac cong snippets", "pha cac co snippets", "pha cac che snippets", "phan cac code snippets", "phap cac code snippets", "pha cau code snippets", "pha cac code 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: (((("pha cac code snippets") or ("dung phuong code snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("pha cac code snippets") OR ("dung phuong code snippets"))) OR ("locating bug code snippets")).
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• Adding a wildcard symbol may retrieve word variants: (((("pha cac code snippets") or ("dung phuong code snippets"))) or ("locating bug code snippets"))*.