Final answer:
Phuong should run the Search terms report to see details of the queries triggering the ads in the campaign.
Step-by-step explanation:
To see details of which queries have been triggering the ads in a campaign that has been running for a few weeks, Phuong should run the Search terms report. This report provides information about the actual search terms that users have entered which triggered the ads. It helps to identify the specific keywords and queries that are driving the ad performance. Phuong can analyze this report to further optimize the campaign by adding or removing keywords based on their performance.