Trying to make my blog work. Some problems I cant figure out

http://embrancesblog.com/ is the site.

a)The search wont work. Not english,not greek,no nothing will show in search results.
b)Archives wont work either.I dont know what I am missing here.
c)Same goes for random page.

It just doesnt make sense 😕

I looked and found this for A:
/forum/plugins/simple-search-plugin-not-showing-results-t6554
Now works,but while I configured it throught the manual way,there should be an option to look int all categories.