... in pronouncing θ, δ, ʃ, ʒ, ʤ, ʧ - find out solutions to make teaching and learning process better so that mistakes in pronouncing θ, δ, ʃ, ʒ, ʤ, ʧ can be avoided 1.2.3 Research questions The above-mentioned ... remarks on Research Question 1: “What common mistakes Vietnamese learners have in pronouncing θ, δ, ʃ, ʒ, ʤ, ʧ? ” It can be confirmed that Vietnamese learners make some common mistakes in pronouncing ... following objectives are set forth as tasks of the study: - identify Vietnamese learners‟ common mistakes in pronouncing θ, δ, ʃ, ʒ, ʤ, ʧ - find out causes of mistakes made by Vietnamese learners in...