Some puzzles are easier than others but by using the method below, they are all solvable in the same way! I'll be using this one to explain
Find the top left corner piece and put it in its place on the top left. Find the top right piece and move it into the top middle slot
Move the top middle piece directly in the center
Move the current pieces around until you can move the piece in the top middle to the right into its correct place of top right and move the center piece upwards into its correct slot of top middle
Find the bottom left piece and move it to center left.
Find the center left piece and move it to the center
Now move pieces around until you can move the bottom left piece into the bottom left slot and then move the center piece to the left
Now all thats left to do is switch the final 3 pieces around and around. They'll find their spot with no issues