Perhaps you should try some spelling variations:
"mau hieu phap tich so dung thuoc" » "mau hieu phap tich so dung hoc", "mau hien phap tich so dung thuoc", "mau lieu phap tich so dung thuoc", "mau hieu pham tich so dung thuoc", "mau hieu phan tich so dung thuoc", "mau hieu phap tinh so dung thuoc", "mau hieu phap dich so dung thuoc", "mau dieu phap tich so dung thuoc", "thau hieu phap tich so dung thuoc", "manh hieu phap tich so dung thuoc", "mau hieu phap tich bao dung thuoc", "mau hieu phap tinh son dung thuoc", "mau hieu phap tich hoc dung thuoc", "mau hieu phap tich noi dung thuoc"
"mau phieu phap tich su dung thuoc" » "mau phieu phap tich su dung hoc", "mau phieu phan tich su dung thuoc", "mau hien phap tich su dung thuoc", "mau lieu phap tich su dung thuoc", "mau phien phap tich su dung thuoc", "mau plieu phap tich su dung thuoc", "mau phieu pham tich su dung thuoc", "mau phieu phap tinh su dung thuoc", "mau phieu phap dich su dung thuoc", "mau chien phap tich su dung thuoc", "mau dieu phap tich su dung thuoc", "mau phieu phap lich su dung thuoc", "mau phieu phap tich du dung thuoc"

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• Performing a fuzzy search may retrieve terms with similar spellings: (("mau hieu phap tich so dung thuoc") or ("mau phieu phap tich su dung thuoc"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("mau hieu phap tich so dung thuoc") OR ("mau phieu phap tich su dung thuoc")).
• Removing quotes may allow a broader search: (( mau hieu phap tich so dung thuoc ) or ( mau phieu phap tich su dung thuoc )).
• Adding a wildcard symbol may retrieve word variants: (("mau hieu phap tich so dung thuoc") or ("mau phieu phap tich su dung thuoc"))*.