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 minh so dung thuoc" » "mau hieu pham minh so dung hoc", "mau hieu phap minh so dung thuoc", "mau sieu pham minh so dung thuoc", "mau chieu phim minh so dung thuoc", "mau dieu pham minh so dung thuoc", "thau hieu pham minh so dung thuoc", "manh hieu pham minh so dung thuoc", "mau hieu pham minh su dung thuoc", "mau hieu pham minh hoc dung thuoc", "mau hieu pham minh noi dung thuoc", "mau hieu pham minh son dung thuoc", "mau hieu pham dinh so dung thuoc", "mau hieu pham hinh so 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 minh so dung thuoc"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("mau phieu phan tich so dung thuoc") OR ("mau hieu pham minh so dung thuoc")).
• Removing quotes may allow a broader search: (( mau phieu phan tich so dung thuoc ) or ( mau hieu pham minh so dung thuoc )).
• Adding a wildcard symbol may retrieve word variants: (("mau phieu phan tich so dung thuoc") or ("mau hieu pham minh so dung thuoc"))*.