Perhaps you should try some spelling variations:
"dung thang doan snippets" » "dung thang code snippets", "hung thang doan snippets", "cung thang doan snippets", "dung thuong doan snippets", "dung trang doan snippets", "dung chan doan snippets", "dung thanh toan snippets"
"locating bug core snippets" » "locating bug code snippets"
"dung java java snippets" » "dung va java snippets"

Try widening your search to All Fields.

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• Performing a fuzzy search may retrieve terms with similar spellings: (((("dung thang doan snippets") or ("dung java java snippets"))) or ("locating bug core snippets"))~.
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