Try searching for rare drops from rare enemies (Hidletorr, Mil Lilly, Red Slime, etc)
Their rare drop usually is 1/2 chance, and only when they drop somthing very special (True Agito, Lavis Cannon for example) they have a 1/22 chance drop rate.
I agree with kevlar, rares on Vhard are not worth the search. Try on Ultimate!
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