Perhaps you should try some spelling variations:
"mau phieu phan tich so dung thuoc" » "mau lieu phan tich so dung thuoc", "mau hieu phap tich so dung thuoc", "mau phe phan tich so dung thuoc", "mau phieu phan tich so dung hoc", "mau chien phan tich so dung thuoc", "mau dieu phan tich so dung thuoc", "mau phieu phan tich bao dung thuoc", "mau phieu phan tinh son dung thuoc", "mau phieu phan tich su dung thuoc", "mau phieu phan tich hoc dung thuoc", "mau phieu phan tich noi dung thuoc"
"mau hieu pham tich so dung thuoc" » "mau hieu pham tich so dung hoc", "mau hieu phap tich so dung thuoc", "mau sieu pham tich so dung thuoc", "mau chieu phim tich so dung thuoc", "mau hieu pham ich so dung thuoc", "mau hieu pham tinh so dung thuoc", "mau hieu pham minh so dung thuoc", "mau dieu pham tich so dung thuoc", "thau hieu pham tich so dung thuoc", "manh hieu pham tich so dung thuoc", "mau hieu pham tich bao dung thuoc", "mau hieu pham tinh son dung thuoc", "mau hieu pham tich su dung thuoc", "mau hieu pham tich hoc dung thuoc", "mau hieu pham tich noi dung thuoc"

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• Performing a fuzzy search may retrieve terms with similar spellings: (("mau phieu phan tich so dung thuoc") OR ("mau hieu pham tich so dung thuoc"))~.
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• Adding a wildcard symbol may retrieve word variants: (("mau phieu phan tich so dung thuoc") OR ("mau hieu pham tich so dung thuoc"))*.