You can enter several names in this field, separated with commas. You can either use a complete name like "Donald Duck" (it will be matched against the list of all characters referenced in Inducks) or directly use an Inducks abbreviation for common names, like "DD" for Donald Duck. The Inducks abbreviation is based on the original name, most of the time in English.
If you want to search for nephews (and nieces etc.) it is important to specify the exact number of nephews. For instance, HDL1 means exactly one nephew, HDL means exactly 3 nephews. A complete list of such group characters is on this page.
As for characters, you can enter several names in this field, separated with commas. You can either use a complete name like "Carl Barks" (it will be matched against the list of all creators referenced in Inducks) or directly use an Inducks abbreviation for common names, like "CB" for Carl Barks.
In this field, you can either enter a complete name (like "Walt Disney's Comics and Stories"), or the Inducks abbreviation (like "WDC"). It is not necessary to enter an issue number in the other field.
Use e.g. fish* to match both fish and fishing. When several keywords are specified, results with the highest number of matching keywords appear first.