Perhaps you should try some spelling variations:
nam thuoc » nam thuc, nam thu, cay thuoc
nha thuoc » nha nuoc, nhan thuc, nha hoc
hieu van » hieu va, thien van, lieu va
van anh » van thanh, tuan anh, van minh
sach ky » sac ky, sach y, sach ty
su sach » so sach, vu sach
lang xa » lang ha, dang xay, lang van
mang xa » mang may, dang xay, mang cua
anh le » manh le, oanh le, anh ve
le cua » ly cua
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: su sach ky ((mang xa) or (lang xa)) hoi. hieu van ((nam thuoc) OR (nha thuoc)) van anh le cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ky ((mang xa) OR (lang xa)) hoi. hieu van ((nam thuoc) OR (nha thuoc)) van anh le cua te*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ky ((mang xa) or (lang xa)) hoi. hieu van ((nam thuoc) OR (nha thuoc)) van anh le cua te*".