Perhaps you should try some spelling variations:
lang van » dang van, tang van, hoang van
vu sach » vu bach, su sach, vu khach
sach le » cach le, sach de, sach lo
le lang » le tang, le dang, le xang
van hoi » van hoa, van hoc, van hoe
hieu va » lieu va, hieu qua
cua tre » cua te, cuu tre, cua triet
xuc va » duc va, tuc va, luc va
vi cua » vai cua, di cua

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

• Performing a fuzzy search may retrieve terms with similar spellings: vu sach le lang van hoi. hieu va cac ((xuc va) or (thuc vat)) hanh vi cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: vu sach le lang van hoi. hieu va cac ((xuc va) OR (thuc vat)) hanh vi cua tre*.