Perhaps you should try some spelling variations:
khong thuoc » khang thuoc, hong phuoc, dong thuoc
khoa thuoc » khoa hoc, nha thuoc, hoc thuoc
hieu khi » hieu chi, thieu nhi, khien khi
nhung bi » nhung gi
doc anh » doc hanh, duoc anh, duc anh
khi cua » chi cua, thai cua
ho vi » hoc vi, hoa vi, ho voi

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

• Performing a fuzzy search may retrieve terms with similar spellings: doc anh ((khoa thuoc) OR (khong thuoc)) hieu khi cua ets : ((nhung bi) or (nhung bai)) ho vi đai~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doc anh ((khoa thuoc) OR (khong thuoc)) hieu khi cua ets : ((nhung bi) OR (nhung bai)) ho vi đai*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doc anh ((khoa thuoc) OR (khong thuoc)) hieu khi cua ets : ((nhung bi) or (nhung bai)) ho vi đai*".