@doandinhytc
Would you please confirm in the Web Apps that the you have the dhis.war file pasted there?
Otherwise, if you renamed it (Dhis.war) to ROOT, then just type http://localhost:8080 and that will load the page accordingly.
Let me know if this helped.
Yes, I put this file on web base folder. I do not change its name. It showed that tomcat intergrated with dhis but still not working with localhost:8080/dhis