Perhaps you should try some spelling variations:
cach thuc » anh thuc, cac thu
dung tren » dung trong, dung trung
lang van » dang van, tang van, hoang van
tu sach » thu sach, su sach, te sach
sach ky » sac ky, sach y, sach ty
ky lang » ky nang, ky dang, ky tang
van hoc » van hoa
hieu ve » hieu va, hieu van
ve cach » va cach, ve cac, ve canh
thuc va » thuc vat, thuc dan, thuc day
va danh » va dinh, va dan, va hanh
danh di » danh du, xanh di, danh dien
cua te » cua tu

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu sach ky lang van hoc. hieu ve cach thuc va danh di ((dung tren) or (cua te))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ky lang van hoc. hieu ve cach thuc va danh di ((dung tren) OR (cua te)).
• Adding a wildcard symbol may retrieve word variants: tu sach ky lang van hoc. hieu ve cach thuc va danh di ((dung tren) or (cua te))*.