Perhaps you should try some spelling variations:
lam thuoc » nam thuoc, am thuc, cay thuoc
danh viet » anh viet, ninh viet, nang viet
doc sach » hoc sach, toc sach, nuoc sach
viet cua » viec cua, viet ca, viet qua
lam duoc » nam duoc, luat duoc, tao duoc
hieu van » hieu va, thien van, lieu va
cay phoi » cap phoi, tay hoi, cay cho
dang cay » dang xay, dang ca, dang cac
sach ky » sac ky, sach y, sach ty
va danh » va dinh, va dan, va hanh
ky dang » ky nang, ky danh
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: doc sach ky dang cay phoi. hieu van ((lam duoc) or (lam thuoc)) va danh viet cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doc sach ky dang cay phoi. hieu van ((lam duoc) OR (lam thuoc)) va danh viet cua te.
• Adding a wildcard symbol may retrieve word variants: doc sach ky dang cay phoi. hieu van ((lam duoc) or (lam thuoc)) va danh viet cua te*.