Perhaps you should try some spelling variations:
lang van » dang van, tang van, hoang van
tu sach » thu sach, su sach, te sach
van hoi » van hoa, van hoc, van hoe
thuc va » thuc vat, thuc dan, thuc day
va hanh » van hanh, va thanh, va danh
ve cac » vien cac
va bao » va bai
vi cua » vai cua, di cua
cua tu » cua tuc, cua su, cua cu

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

• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach _ lang van hoi. hieu ((ve cac) OR (((va bao) OR (va cac)))) thuc va hanh vi cua tu~.
• Adding a wildcard symbol may retrieve word variants: tu sach _ lang van hoi. hieu ((ve cac) or (((va bao) or (va cac)))) thuc va hanh vi cua tu*.