Perhaps you should try some spelling variations:
cua thuoc » nha thuoc, cay thuoc, cua nuoc
thuoc va » thuc va, thuoc ma, thuong va
sach tu » sach thu, cach tu, sach ty
hanh va » hang va, hanh vi
va hanh » van hanh, va thanh, va danh
hieu va » lieu va, hieu qua
te sach » toc sach
nang xa » lang xa, nang ma, ang xa
mang xa » lang xa, mang may, dang xay
cau tre » cau tren, cau treo, cau tra
va cua » va chua, via cua, ca cua
va cau » van cau, va cac, va dau

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: te sach tu ((((nang xa) OR (mang xa))) or (nang x)) hoi. hieu va cua thuoc va hanh va cau tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach tu ((((nang xa) OR (mang xa))) OR (nang x)) hoi. hieu va cua thuoc va hanh va cau tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach tu ((((nang xa) OR (mang xa))) or (nang x)) hoi. hieu va cua thuoc va hanh va cau tre".
• Adding a wildcard symbol may retrieve word variants: te sach tu ((((nang xa) OR (mang xa))) or (nang x)) hoi. hieu va cua thuoc va hanh va cau tre*.