Perhaps you should try some spelling variations:
danh vit » danh viet, dinh viet, dang viet
ly lang » ly hang, ly vang, ly lanh
le lang » le tang, le dang, le xang
hieu ve » hieu va, hieu van
truc va » thuc va, trung va
cu tren » tu tren, dua tren
ve cau » ke cau, va cau, ve cac
vit cu » vit ca
sinh » dinh, minh, kinh

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 ((ly lang) or (le lang)) xa hoi. hieu ve cau ((truc va) OR (thuc vat)) danh vit cu tren~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc sinh ((ly lang) OR (le lang)) xa hoi. hieu ve cau ((truc va) OR (thuc vat)) danh vit cu tren.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc sinh ((ly lang) or (le lang)) xa hoi. hieu ve cau ((truc va) OR (thuc vat)) danh vit cu tren".
• Adding a wildcard symbol may retrieve word variants: hoc sinh ((ly lang) or (le lang)) xa hoi. hieu ve cau ((truc va) OR (thuc vat)) danh vit cu tren*.