Hi Hina,
You can use * and ? wildcard characters for that. For example:
item("flight*") will get an item that starts with "flight"
item("*flight") will get an item that ends with "flight"
item("*flight*") will get an item that contains "flight"
Asterisk is for n quantity of characters, while ? is for as many characters as symbols (??? will be 3 characters)
You can find more information in http://support.smartbear.com/viewarticle/33366/ article.
Hope it helped!