Perhaps you should try some spelling variations:
tham thuc » nham thuc, pham thuc, tam thuc
day hanh » day nhanh, day thanh, dao hanh
thuc day » thuc dan, thuc vat
te sach » toc sach
sach ly » sach y, sach lo, sach ty
hoi cuu » hoi chu, hoi cua, hoi cau
ve tham » va tham, ve cham, vi tham
hieu ve » hieu va, hieu van
nang xa » lang xa, nang ma, mang xa
ho cuu » ho chu, ho cua, so cuu

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 ly ((nang xa) OR (nang x)) hoi. hieu ve tham thuc day hanh ((hoi cuu) OR (ho cuu)) tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ly ((nang xa) or (nang x)) hoi. hieu ve tham thuc day hanh ((hoi cuu) OR (ho cuu)) tre~".
• Adding a wildcard symbol may retrieve word variants: te sach ly ((nang xa) or (nang x)) hoi. hieu ve tham thuc day hanh ((hoi cuu) OR (ho cuu)) tre*.