What is the little circle on top of the u ?
Read the tips and notes. It denotes a long u.
I don't have tips for the czech language!? I thought no tips available
Use your (mobile) web browser.
Why not "tento dům"
= this house
Proc ne, "tam dum"?
"Tamten dům" is correct and should be accepted, "tam dům" does not make any sence, sorry.
tam means '(over) there'