In IELTS Reading Test most often candidates are confused between the term in the question and the term in the passage while finding answers, especially in the case of, True / False / Not Given.
To solve this issue one must be familiar with the term paraphrasing. This is a technique in which a set of words in a sentence is replaced with different vocabulary which actually means nothing different from the previous words used. However, by doing this the test is able to confuse the test taker and find the real level of fluency in the candidate.
To be able to recognise and solve this issue one must do a lot of homework. Try and paraphrase the sample essays in the IELTS preparation materials, those are written by the examiners. Later on, once you think you are good at doing it, try and rephrase the sentences in the reading passage in the IELTS preparation materials. This will make you familiar with different ways of saying the same sentence.