diff --git a/03/title.txt b/03/title.txt
new file mode 100644
index 0000000..fb6f47c
--- /dev/null
+++ b/03/title.txt
@@ -0,0 +1 @@
+Chương 3
\ No newline at end of file
diff --git a/manifest.json b/manifest.json
index 2d0eeb3..0542527 100644
--- a/manifest.json
+++ b/manifest.json
@@ -36,13 +36,18 @@
 		"VietnamGL4"
 	],
 	"finished_chunks": [
+		"01-title",
 		"01-01",
 		"01-22",
 		"01-26",
+		"02-title",
 		"02-18",
 		"02-21",
 		"02-25",
+		"03-title",
+		"04-title",
 		"04-04",
+		"05-title",
 		"05-01",
 		"05-04"
 	]