C14: Chinese for Hospital (C&T version)
C13: Chinese for Massage Business (C&T version)
C12: Chinese Conversation for Tourist Guides (C&T Version)
C11: Chinese Conversation for Hotel (C&T comparison)
C10: Conversation for Retail Sale (C E & T version)
C9: Knows Chinese Well- (with video version)
C8: Zhong Wen (Total 18 volumes)
C7: Interactive Chinese
C6: 301 Sentences for Chinese Conversation
C5: IT Talk
C4: Chinese for Banking and Finance
C3: Chinese-Thai Context I & II