How do you get Giadrome Claw plus or Blangonga Fang plus on monster hunter freedom unite

"plus" materials comes from stronger versions of the same monster. you'll get Giadrome Claw+ can be found from Giadrome high rank. (i mean your mission should come from the "middle lady" when you take it inside the gathering hall.)

break the fang of a high rank Blangonga with fire attribute weapons to get some.