"They want to develop infrastructure."
Translation:Họ muốn phát triển cơ sở hạ tầng.
"Develop" means to grow, expand or spread so it may be inferred an infrastructure exists and we are dealing with a specific one. Thus, "THE infrastructure" seems to be in order. No, not seems, use it. "THE " is used with specific nouns. Do not use with plurals nouns unless they are specific. These rules need to be placed at the beginning of a course and consistently followed so as not to cause undue gnashing of teeth and pulling one's hair out of their scalp.
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