Perhaps you should try some spelling variations:
hieu van » hieu va, thien van, lieu va
sinh ky » sinh ly, sinh y, kinh ky
ky lang » ky nang, ky dang, ky tang
lang xa » lang ha, dang xay, lang van
hieu ve » hieu va
truc va » thuc va, thuc vat, trung va
va danh » va dinh, va dan, va hanh
danh vi » hanh vi, dinh vi, danh di
ca tren » cau tren, cu tren, la tren
vi ca » vit ca, li ca, va ca

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 ky lang xa hoi. ((hieu ve) OR (hieu van)) cau truc va danh vi ca tren~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc sinh ky lang xa hoi. ((hieu ve) OR (hieu van)) cau truc va danh vi ca tren".
• Adding a wildcard symbol may retrieve word variants: hoc sinh ky lang xa hoi. ((hieu ve) OR (hieu van)) cau truc va danh vi ca tren*.