There are several reasons for international expansion, as for the Gulf countries such as UAE and Qatar I believe seeking a bigger market is one of strongest motivations to invest at central Europe, for example pupolation at Poland is almost 10 times
I meant 10 times of population of Qatar in my previous answer . Another reason could be related to "resources seeking" that is the availability of certain resources that are available at those host countries
Some investments from the Gulf countries in the region, particularly in the agriculture sector, are motivated by improving their food security. This is discussed in greater detail in the following paper:
Heumesser, C., & Schmid, E. (2012). Trends in foreign direct investment in the agricultural sector of developing and transition countries: a review. Universitat fur Bodenkultur Wien Department fur Wirtschafts-und Sozialwissenschaften, Vienna.