Perhaps you should try some spelling variations:
cua thuoc » nha thuoc, cay thuoc, cua nuoc
thanh ky » hanh ky, than ky, thanh tay
lanh ky » hanh ky, nganh ky, lanh lay
nang xa » nang x, lang xa, nang ma
hieu ve » hieu va, hieu van
va hanh » van hanh, va thanh, va danh
ve cao » va cao, ve bao, ve cac
cua te » cua tu
su va » su van, tu va

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

• Performing a fuzzy search may retrieve terms with similar spellings: thuat ((lanh ky) OR (thanh ky)) nang xa hoi. hieu ve cao su va hanh vi ((cua te) or (cua thuoc))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thuat ((lanh ky) OR (thanh ky)) nang xa hoi. hieu ve cao su va hanh vi ((cua te) OR (cua thuoc)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "thuat ((lanh ky) OR (thanh ky)) nang xa hoi. hieu ve cao su va hanh vi ((cua te) or (cua thuoc))".
• Adding a wildcard symbol may retrieve word variants: thuat ((lanh ky) OR (thanh ky)) nang xa hoi. hieu ve cao su va hanh vi ((cua te) or (cua thuoc))*.