to remember vaguely ☊ 
bập bõm ☊ to remember suddenly ☊ chợt nhớ ☊ to suddently remember (sth) ☊ chợt nhớ tới ☊ to remember things in the past ☊ hoài cổ ☊ an important thing to remember is ~ ☊ một điều quan trọng nên nhớ là ☊ remember vaguely, remember approximately ☊ nhớ chừng ☊ to remember vaguely, dimly ☊ nhớ mang máng ☊ to remember exactly ☊ nhớ như in ☊ to remember that ☊ nhớ rằng ☊ (you) should remember that ☊ nên nhớ rằng ☊ to suddenly remember (sth) ☊ sực nhớ đến ☊