Perhaps you should try some spelling variations:
cau thuc » cau truc, cuu thuc, can thuc
vat danh » va danh, van danh, luat danh
lang xa » lang ha, dang xay, lang van
hieu ve » hieu va, hieu van
danh va » doanh va, hanh va, anh va
ca tren » cau tren, cu tren, la tren
ve cau » ke cau, va cau, ve cac
va ca » va cac, va cao, va cai

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: hoc sinh _ lang xa hoi. hieu ve cau thuc vat danh va ca tren~.
• Adding a wildcard symbol may retrieve word variants: hoc sinh _ lang xa hoi. hieu ve cau thuc vat danh va ca tren*.