To search for a phrase, use double quotation marks, for example "digital television".
Wildcard searches can be done using the asterix (*) character. So searches for tele* will include results for 'telecom', 'telecommunications', 'telephone', 'television', 'Telenor', 'telco' etc.
The terms AND and OR can be used in any combination, for example (e-cinema OR d-cinema) AND France will search for items that has the words 'France' and either 'd-cinema' or 'e-cinema'.