Lower abs & obliques how can I get it would anybody know something in this help?

Actually I've got the first 4 abs ofcourse after a hard training & exercises but my lower abs won't show up I don't know y !! Actually I was 55kg before 1 year & now I'm 70 kg of muscles but without lower abs & that sucks... I've tried everything & now idon't know what to do so would anybody help?
Lower abs & obliques how can I get it would anybody know something in this help?
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