[quản trị cháÂÃ] [văn hoÌ£c] [giám ÄÃÃ�] [BÆÃââ‚�] [BàmáºÂÂÂt thành cồng] [Bá»™ ÄÂ�ÃÂÂ] [55000 câu giao tiếp] [bài táºÂÂp hóa lá»›p 8] [éŸ³ç´ ã�¨ã�¯] [How comes no one talks about a ginormous inland sea in Western Siberia that only disappeared as recently as 8 000–4 000 BC?]