You'll learn that enigma2 receivers and their images work differently from other decoders. So, even if there is not "search options" of channels, you have two ways to have an easier life.
1) The most important thing in enigma2 is the fact that, differently from normal decoders, there is no sense in having ALL the channels together (as I was forced to have, for instance, in my old Humax 5400...): here you should take advantage of BOUQUETS, that means customized group of channels where a user stores the channels. For instance, you can create a MAIN BOUQUET only for the channel you watch more often; then another for the SPORT channels; another for the ENGLISH ones, and so on... These are just examples, of course. Note that a channel can be put in as many bouquets as you like. So if a sport channel is in the second bouquet in my example, it doesn't mean it cannot be also in the MAIN.
2) All the other channels that are not in any of your personal bouquets, are always accessible in 3 ways. Press UP/DOWN to access the list of channels and then you can see the list of channels:
-ALL TOGETHER (pressing the red button -ALL) ;
-SAT-DVB-T (pressing the green button) where you can choose the satellites you have or the terrestrial, if you have;
-Providers (pressing yellow button).
So, for instance, by UP/DOWN and then red button, you have the "old", complete list of channels where they are sort in alphabetical order and it's quite fast to get to the channel you want.
If you install OBH instead of BH, you can also jump to the first channel starting by a letter pressing the corresponding key on your remote. For instance: if you want to jump to the first channel whose name starts by the letter "K", you press the "5" key on your remote (twice or 3 times, depending on how you configure this function).
Remember, also, that the bouquets can be arranged in the order you want and the channels in the first of the list of bouquets will get the numbers from 1, 2, on...