Once you have the meat (your concepts), you can then start to put together a search strategy with AND/OR/NOT; (see image below). You should consider synonyms as well. Perhaps other authors refer to dogs as canines in their article or specifically the breed German Shepard. You want ot make sure you get ALL of the relevant possibilities for your research.
In Google I can type in, "What's the weather like in Vancouver this weekend?" and I receive the answer. You need to dumb down your inquiry to short, important pieces of information for database searching.
To help you think through this process of building a good search, here's a little tool that can help you construct effective searches for ALICE, many article databases, and more. We call it Search Strategy Builder.
Just click on the link above, fill in the blanks, and click the button to create a Search Statement. You can then copy and paste that statement into the database of your choice.