Thank you very much for your answer , and I read the link by Dr.Azzam and I think that the choice of keywords is important factor in citation to make paper more attractive for researchers in the same field.
Well Prof , you have access to the best "human resource" , train your students to continue work and publish the success or design or even the failures , cite the work done so far !!! Research /citation is about continuity it should not be confined to us , it should grow ...
From one point of view, continue to be active in writing papers. More papers logically result in more citations. Also, the quality of the paper plays its role.