English to Portuguese and vietnamese Translation

I'm looking to hire a translator to help with some marketing material. I need someone who is fluent in English and proficient in both Portuguese and Vietnamese. The source language is English and the target language is mainly Vietnamese, though bilingual in both languages is preferred. The material needing to be translated is marketing material, such as sales materials, promotional materials and press releases. I'm looking for someone who can quickly produce high quality work, accurately conveying the message across both languages. The ability to keep up with tight deadlines and changing instructions is a must.