English language -- 20 Interpersonal communication 19 Public speaking 19 Self-presentation 19 Foreign relations -- 16 Politics and government 14 Politics and government -- 12 more ... Spanish language -- 11 Study and teaching 10 History 9 Foreign relations 8 Writing 8 Economic conditions 7 Grammar 7 Leadership 7 Speeches, addresses, etc 7 Etiquette 6 Glossaries, vocabularies, etc 5 Management 5 Negotiation 5 Social conditions 5 Business communication 4 Business writing 4 Communication 4 Courses -- 4 Diplomatic training 4 Foreign policy 4 Non-verbal communication 4 Oral communication 4 Terrorism 4 less ...