The seven regions formed by the intersecting ellipses are each home to exactly one of the seven tiles.
Can you place the tiles so that those in each ellipse can be rearranged to solve the corresponding clue?
In order to get exactly one tile in each of the seven internal regions, the Venn diagram should be resolved as follows:
This way:
The 'A:Country' category contains all the segments required to spell the name of the Asian country CA-MB-OD-IA;
The 'B:Country' category contains all the segments required to spell the name of the South American country CO-LO-MB-IA;
The 'C:Grave' category contains all the segments required to spell the word CA-TA-CO-MB, a synonym of 'grave'.
(NB The choice of which country to place in which of the two country circles is arbitrary - I went with alphabetical order...)