Perhaps you should try some spelling variations:
lang mai » lang dai, lang hai, lang man
thanh va » thanh van, hanh va, thanh ha
thuc dan » thuc hanh, hoc dan, thuc vat
thuc ban » thuoc ban, thu ban, thuc van
cua tre » cua te, cuu tre, cua triet
vi tham » vi pham, va tham, vi than
ky lang » ky nang, ky dang, ky tang
ve tham » va tham, ve cham, van tham
mai hoi » mai khoi, dai hoi, lai hoi
va cua » va chua, via cua, ca cua
tu cao » cu cao, tu cac, vu cao

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 cao ky lang mai hoi. hieu ((ve tham) OR (vi tham)) ((thuc ban) OR (thuc dan)) thanh va cua tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu cao ky lang mai hoi. hieu ((ve tham) OR (vi tham)) ((thuc ban) or (thuc dan)) thanh va cua tre~".
• Adding a wildcard symbol may retrieve word variants: tu cao ky lang mai hoi. hieu ((ve tham) OR (vi tham)) ((thuc ban) or (thuc dan)) thanh va cua tre*.