Perhaps you should try some spelling variations:
cua thuoc » nha thuoc, cay thuoc, cua nuoc
hanh vai » hanh vi, hanh va, hanh tai
van hanh » van thanh, ban hanh, van anh
cham duc » cham soc, pham duy, phan duc
hieu van » hieu va, thien van, lieu va
dang ha » dong ha, dung ha, lang ha
ky dang » ky nang, ky danh
vai cua » dai cua, hai cua, lai cua
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 duc) OR (pham duc)) van hanh vai 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 duc) OR (pham duc)) van hanh vai 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 duc) OR (pham duc)) van hanh vai cua thuoc".
• Adding a wildcard symbol may retrieve word variants: ((su sac) or (su xac)) ky dang ha noi. hieu van ((cham duc) OR (pham duc)) van hanh vai cua thuoc*.