diff --git a/ch2-inventory/student-trungdc/02-nonFQDN.yml b/ch2-inventory/student-trungdc/02-nonFQDN.yml
new file mode 100644
index 0000000..fd57342
--- /dev/null
+++ b/ch2-inventory/student-trungdc/02-nonFQDN.yml
@@ -0,0 +1,10 @@
+all:
+  hosts:
+    centos21:
+      ansible_host: 192.168.100.21
+    centos22:
+      ansible_host: 192.168.100.22
+    ubuntu11:
+      ansible_host: 192.168.100.11
+    ubuntu12:
+      ansible_host: 192.168.100.12
diff --git a/ch2-inventory/student-trungdc/03-hostgroups-children.yml b/ch2-inventory/student-trungdc/03-hostgroups-children.yml
new file mode 100644
index 0000000..ed750b5
--- /dev/null
+++ b/ch2-inventory/student-trungdc/03-hostgroups-children.yml
@@ -0,0 +1,18 @@
+all:
+  children:
+    linux:
+      children:
+        centos:
+          hosts:
+            centos21:
+              ansible_host: 192.168.100.21
+            centos22:
+              ansible_host: 192.168.100.22
+        ubuntu:
+          hosts:
+            ubuntu11:
+              ansible_host: 192.168.100.11
+            ubuntu12:
+              ansible_host: 192.168.100.12
+  hosts:
+    fakehost.local
diff --git a/ch2-inventory/student-trungdc/04-hostvars.yml b/ch2-inventory/student-trungdc/04-hostvars.yml
new file mode 100644
index 0000000..2cf8c58
--- /dev/null
+++ b/ch2-inventory/student-trungdc/04-hostvars.yml
@@ -0,0 +1,23 @@
+all:
+  children:
+    linux:
+      children:
+        centos:
+          hosts:
+            centos21:
+              ansible_host: 192.168.100.21
+              foo: bar1
+            centos22:
+              ansible_host: 192.168.100.22
+              foo: bar1
+        ubuntu:
+          hosts:
+            ubuntu11:
+              ansible_host: 192.168.100.11
+              foo: bar
+            ubuntu12:
+              ansible_host: 192.168.100.12
+              foo: bar2
+  hosts:
+    fakehost.local:
+      foo: bar3