Perhaps you should try some spelling variations:
nam thuoc » nam thuc, nam thu, nha thuoc
hieu van » hieu va, thien van, lieu va
thuoc va » thuc va, thuoc ma, thuong va
vu sach » vu bach, su sach, vu khach
sach ky » sac ky, sach y, sach ty
nang xa » nang ma, mang xa, ang xa
lang xa » lang ha, dang xay, lang van
va hanh » van hanh, va thanh, va danh
vi cua » vai cua, di 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: vu sach ky ((((nang xa) or (nang x))) or (lang xa)) hoi. hieu van nam thuoc va hanh vi cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: vu sach ky ((((nang xa) OR (nang x))) OR (lang xa)) hoi. hieu van nam thuoc va hanh vi cua te.
• Adding a wildcard symbol may retrieve word variants: vu sach ky ((((nang xa) or (nang x))) or (lang xa)) hoi. hieu van nam thuoc va hanh vi cua te*.