The document provides 57 formulas for converting sentence structures in Vietnamese. Some examples of conversions include: 1) Changing "S + be + adj + prep" to "S + V + adv" 2) Changing "S + remember to do Sth" to "S + don’t forget to do Sth" 3) Changing structures with verbs like "get", "ask", "request" to ones using "have" instead.