Exporting from MS Word to PDF

Hi,

I use the command Export from MS Word (*docx). When exported to PDF, usually the fonts are not kept with the same look (apearance). Even when the same font is installed all over the computer, and the font selector shows me that the font is there, with the same size and aspect, the PDF shows something different. I use "Bookman Old Style". So, is there a way I can keep exactly the same look of the font worked in MS word? Or is not secure?

Other similar situation: When exported, the Bookman oldstyle for example is shown as the original, ok! so far... but when I try to copy it and paste somewhere else in the same PDF, the style and appearance of the font disappears. Even when the font selector in Acrobat shows me that the font is right there! How come Acrobat shows me something RENDERED on a different way! The attached pic illustrates the problem. Why is not posible to keep the same look of the exported document?