Best adhesive for very thin gap. - Tile Advice

[Dodger2303]

Hi all

I have to replace a handful of quarry tiles on a cement based kitchen floor. I guess a long time ago these tiles were laid directly onto cement (with the cement potentially as the adhesive).

I now have thinner tiles so I can relay them onto the concrete only the space between the tile and the floor is only around 5mm at most.

What would be the ideal adhesive.

Thanks

Russ