Now that federal census images are available online from multiple providers, it's always a good idea to search each of them for your missing ancestors.
Some of the reasons why this is a good idea:
• Indexers may interpret handwritten names differently, leading to elusive family members
• Image quality may improve from another provider
• Some years of the decennial census may be completely indexed at one provider and not at another
Give the census from an alternative source like FamilySearch a try – you may be pleasantly surprised.