You shouldn't pay attention to such dreams. They are simply the projections of your unconscious mind. On the precise Islamic teaching about dreams, you may refer to the following answer under the attached link.
As for finding a suitable marriage partner, should pray to Allah earnestly while making use of the various resources: the imams, leaders, and friends you can trust as well as the Islamic marriage services such as those of ISNA (http://www.isnamatrimonials.net/Matrimonial/).
There is no specific du'as that are prescribed; so, you may use any general du'as such as the following:
Rabbi hab lee zawjan saalihan yakoonu lee 'awnan fee deenee wa dunyaaya
(My Lord, grant me a righteous spouse who would be an asset for me in my religion and worldly life.)
Allaahumma rahmataka arjoo falaa takilnee tarafata a'ynin; wa aslih lee sha'nee kullahu
(O Allah, I seek Your infinite mercy; so do not abandon me to my own devices; and straighten out all of my affairs for me).
Hasbiya Allah laa ilaaha illaa huwa 'alayhi tawakkaltu wa huwa rabbu al-'arshi al-azheem
(Allah is sufficient for me; there is no god beside Him; I place my trust in Him; He is the Lord of the Mighty Throne).
There is no need for you to limit to the Arabic words; Allah hears all sincere prayers.