What is the "Am Acher" to which the Torah is referring?
Targum Onkelos and Targum Yonasan: It means literally to members of a different nation.
Oznayim la'Torah: It refers to children, who, on account of the Tzaros that Yisrael are undergoing, stray from the path of Torah and do off to seek 'a better life' elsewhere, whilst their parents who have remained true to Torah, look and pine for them to return, but are helpless to do anything about it.
What are the connotations of "Vechalos Aleihem"?
Rashi: It means 'You will pine for them in vain. 1
Rashi in Tehilim, 69:4: Hope that is drawn-out and is not realized is called 'Kilyon Einayim'.
What are the connotations of "ve'Ein le'Eil Yadecha"?
Targum Yonasan: It means that you will not have good deeds to your credit to support you when you Daven to your Father in Heaven to redeem them.