Perhaps you should try some spelling variations:
"kien thuc luat va minh doanh" » "kien thuc luat va kinh doanh", "kien thuc luat va minh danh", "kien thuc luat va minh doan", "kien thue luat va minh doanh", "kien thuc luan va minh doanh", "kien thuoc luan va minh doanh", "kien thuc xuat va minh doanh", "kien thuc luat ve minh doanh", "kien thuc suat va minh doanh", "kien thuc luat vua minh doanh", "kien thuc luat va tinh doanh"
"kien thuc luat van minh doanh" » "kien thuc luat van kinh doanh", "kien thuc luat van minh danh", "kien thuc luat van minh doan", "kien thue luat van minh doanh", "kien thuc luan van minh doanh", "kien thuoc luan van minh doanh", "kien thuc luat dan minh doanh", "kien thuc luat ban minh doanh", "kien thuc xuat van minh doanh", "kien thuc luat ven minh doanh", "kien thuc suat van minh doanh"

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• Performing a fuzzy search may retrieve terms with similar spellings: (("kien thuc luat va minh doanh") OR ("kien thuc luat van minh doanh"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"kien thuc luat va minh doanh\") OR (\"kien thuc luat van minh doanh\"))".
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• Adding a wildcard symbol may retrieve word variants: (("kien thuc luat va minh doanh") OR ("kien thuc luat van minh doanh"))*.