convert pdf files into microsoft word

I have 2 manuals each around [login to view URL] and 3 e-books around 60 pages all are formatted and have photos . I have a? problem, that I am unable to reliable read or use the currentword documents that has been provided, some of the opinions as to the causeare, that it can happen by cutting and pasting from a pdf, in the deliveryprocess ,document too big, and some have suggested that it is because i operatea Mac version word 2008? and it is not compatible I give you thisinformation for completeness of details as I need it rectified [login to view URL] include your method of treating the files .eg,re type ,use a program that converts pdf into word. thank you for your interest in this project.