Perhaps you should try some spelling variations:
cua thuoc » nha thuoc, cay thuoc, cua nuoc
hanh lai » hanh lam, hanh tai, thanh lap
van cham » van chat, van tham, va cham
hieu van » hieu va, thien van, lieu va
dang ha » dong ha, dung ha, lang ha
ky dang » ky nang, ky danh
soc van » hoc van, sac van, soc dan
lai cua » dai cua, hai cua, lai chau
oc van » hoc van, luoc van, quoc van
su xac » pu xac, su cac
su sac » su sach, su cac

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((su sac) or (su xac)) ky dang ha noi. hieu van cham ((soc van) OR (oc van)) hanh lai cua thuoc~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((su sac) OR (su xac)) ky dang ha noi. hieu van cham ((soc van) OR (oc van)) hanh lai cua thuoc*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((su sac) or (su xac)) ky dang ha noi. hieu van cham ((soc van) OR (oc van)) hanh lai cua thuoc*".