Add spaces: Travelagency--Austriaholidays

Answer: Travel agency -- Austria holidays

Add spaces: DressupLisaKudrowandotherfamouscelebritiesonStardoll.

Answer: Dress up Lisa Kudrow and other famous celebrities on Stardoll.

Add spaces: Sawntimberarecalledsobecausetheyareobtainedbysawingthetreetrunk.

Answer:
Sawn timber are called so because they are obtained by sawing the tree trunk.