Perhaps you should try some spelling variations:
thien van » thi van
cua thuoc » nha thuoc, cay thuoc, cua nuoc
hieu van » hieu va, lieu va, hieu ve
cham hoc » cham soc, chat hoc, cham hoi
ban hanh » ban hang
hanh dai » hanh tai, hanh dao, vanh dai
ky dang » ky nang, ky danh
dang ha » dong ha, dung ha, lang ha
hoc ban » hoc bang, hoc dan, hoc bai
su sac » su sach, su cac, su xac
sac ky » cac ky, sai ky

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 ky dang ha noi. ((hieu van) or (thien van)) cham hoc ban hanh dai cua thuoc~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sac ky dang ha noi. ((hieu van) OR (thien van)) cham hoc ban hanh dai cua thuoc.
• Adding a wildcard symbol may retrieve word variants: su sac ky dang ha noi. ((hieu van) or (thien van)) cham hoc ban hanh dai cua thuoc*.