Perhaps you should try some spelling variations:
"trinh doanh quoc snippets" » "trinh danh quoc snippets", "kinh doanh quoc snippets", "chinh doanh quoc snippets", "trinh doan quoc snippets", "trinh doanh cuoc snippets", "trinh doanh duoc snippets", "trinh doanh quoc slippers"
"dung bug code snippets" » "dung dung code snippets", "dung hung code snippets", "dung rung code snippets", "dung bug code slippers", "dung bug core snippets"
"locating bug code snippets" » "locating bug code slippers", "locating bug core snippets"

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