Accurate evaluation of machine translation is a very interesting problem in the field of automatic translation. The translation tools are mainly supported language pairs having been used in the world and very limited for the poor language pairs about bilingual corpus or linguistics resources. However, they can use Interlingua language which has a large bilingual corpus (e.g. English) to translate. In this paper, the authors use the free online Google Translation tool for testing the two methods: direct translation from English into Vietnamese and interlingua translation using French, German.