Perhaps you should try some spelling variations:
"dung quang dong snippets" » "dung quang code snippets", "dang quang dong snippets", "luong quang dong snippets", "dung luan dong snippets", "dung quang dung snippets", "dung quan dong snippets", "dung quang cuong 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 quang dong snippets") or ("dung java java snippets"))) or ("locating bug core snippets"))~.
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