Perhaps you should try some spelling variations:
cua thuoc » nha thuoc, cay thuoc, cua quoc
nam thuc » nam thuoc, am thuc, nam thu
thuc van » thuc vat, thuc dan, thuc va
van hanh » van thanh, ban hanh, van anh
cua nuoc » cua quoc, cua nguoi, nha nuoc
te sach » toc sach
lang xa » lang ha, dang xay, lang van
hieu he » hieu ve, hiem he, hieu le
y lang » o lang, _ lang, tay lang
he nam » ha nam, nghe nam
cua tu » cua tuc, cua su, cua cu

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 y lang xa hoi. hieu he nam thuc van hanh vi ((cua tu) OR (((cua thuoc) OR (cua nuoc))))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach y lang xa hoi. hieu he nam thuc van hanh vi ((cua tu) or (((cua thuoc) OR (cua nuoc))))~".
• Adding a wildcard symbol may retrieve word variants: te sach y lang xa hoi. hieu he nam thuc van hanh vi ((cua tu) or (((cua thuoc) OR (cua nuoc))))*.