Perhaps you should try some spelling variations:
lang xa » dang xay, lang van
lang ha » long ha
hieu va » lieu va, hieu qua
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
sinh y » sinh ly
va cau » van cau, va cac, va dau
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 y ((lang xa) OR (lang ha)) hoi. hieu va cau truc va danh vi ca tren~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc sinh y ((lang xa) OR (lang ha)) hoi. hieu va cau truc va danh vi ca tren".
• Adding a wildcard symbol may retrieve word variants: hoc sinh y ((lang xa) OR (lang ha)) hoi. hieu va cau truc va danh vi ca tren*.