Perhaps you should try some spelling variations:
cham thuc » nham thuc, pham thuc, tham thuc
te sach » toc sach
ve cham » va cham, ve chat, vu cham
va danh » va dinh, va hanh, dia danh
hieu ve » hieu va, hieu van
nang xa » nang x, lang xa, nang ma
sach v » sach va, sach y, sach 2
v nang » va nang, vu nang, van nang
va dan » ca dan, va dao, va dau

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: te sach v nang xa hoi. hieu ve cham thuc ((va danh) OR (va dan)) di ((cua vat) OR (hoa viet))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach v nang xa hoi. hieu ve cham thuc ((va danh) OR (va dan)) di ((cua vat) or (hoa viet))~".
• Adding a wildcard symbol may retrieve word variants: te sach v nang xa hoi. hieu ve cham thuc ((va danh) OR (va dan)) di ((cua vat) or (hoa viet))*.