Important: do not use a space between the operators +, - and * and the connected words.
A + (plus sign) before a word specifies that the word must show up in the records. The search is programmed to use the + before each search term automatically.
A - (minus sign) before a word specifies that this word must not show up in the records. Example: aureus -augustus will search for all records including the word aureus but lacking the word augustus.
The * (asterisk) serves as wildcard and must be attached to the end of a word. It will match the words that start with the term before the operator *. A wildcard will be added to each word of 3 letters or more automatically. Example: sest* will find all words starting with sest, so both sesterz as well as sestertius.
Brackets do form search subgroups. They can be interlaced. Example: augustus (denarius aureus) will find all records including the words augustus and denarius or augustus and aureus.
A word order in quotes only matches records that include this exact word order. Example: "RIC 152" will only find records that include RIC 152, but not those that include RIC: 152.