Truncation, also called stemming, is a technique that broadens your search to include various word endings and spellings. Term truncation is particularly useful for languages with case endings, as it allows you to include all the inflected forms of the search term in the search. In Masto-Finna the truncation symbol is the asterisk *.
Wildcards substitute a symbol for one letter of a word. In Masto-Finna the wildcard symbol is ? which is is used to replace one letter. Using wildcards is especially useful if a word is spelled in different ways, but still has the same meanings.
If you want to search for an exact phrase (search word appearing next to each other) use quotation marks around the words, for example "wireless network". If you don't use quotation marks around the words, many databases will look fo the search words individually, so that the search results will include material where the search terms can be apart from each other which may make the result irrelevant. The quotation marks also work in Google searches.
Boolean logic allows you to connect your search words together to either narrow or broaden your set of results. When you need more than one word to describe your search problem, you can combine multiple search terms with Boolean operators. Thoperators are AND, OR and NOT. Note that Boolean operators must be written in capitals.
You can think of peer review as a "stamp of approval" from academic experts. When an article is published in a peer-reviewed journal, you'll know that experts in the relevant field have read the article and, independent of their own particular opinions, verified it to meet a high standard of scholarship. Peer reviewed journals are occasionally also called scholarly or refereed journals depending on the publisher.
Almost all library databases including Masto-Finna have a box or a tab that allows you to limit your search results to peer reviewed articles.
Most databases include a guide on how to retrieve information from the database. The search functions in different databases are often very similar, but they might use different wild cards or truncations. It's useful to check the guides before starting your search.