TickTick provides "AND" and "OR" for combining the filters to set up the custom smart list you need.
|AND||Tasks need to meet all filters at the same time|
|OR||Tasks need to meet at least one of the filters|
Meanwhile, you may use them in the same filter such as "today OR overdue" for searching tasks that are either due today or are overdue. For example, a custom smart list "today AND high priority" will contain all tasks that are due today with high priority.
Here are a few examples for you to try out:
|Filter||What it does|
|today OR high priority||Show all tasks that are either due today or with high priority.|
|next 7 days AND assigned to me||Show all tasks that are assigned to me and are also due in the next 7 days.|
|(today OR overdue) AND high priority||Show all tasks that are either due today or are overdue, but they must be high priority.|
|(#computer AND #work)||Show all tasks are tagged with both #computer and #work.|
|inbox AND no date||Show all tasks without dates in inbox.|