Perhaps you should try some spelling variations:
thanh ky » hanh ky, than ky, thanh tay
hieu voi » hieu moi, lieu voi, hieu loi
lanh ky » hanh ky, nganh ky, lanh lay
hieu vi » hieu va, hieu ve, hien vi
va hanh » van hanh, va thanh, va danh
vi luu » vi lua
x hoi » xa hoi, o hoi, x ho
tru » truc

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 x hoi. ((hieu vi) OR (hieu voi)) pham duc va hanh vi luu tru~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thuat ((lanh ky) OR (thanh ky)) nang x hoi. ((hieu vi) OR (hieu voi)) pham duc va hanh vi luu tru.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thuat ((lanh ky) or (thanh ky)) nang x hoi. ((hieu vi) OR (hieu voi)) pham duc va hanh vi luu tru".
• Adding a wildcard symbol may retrieve word variants: thuat ((lanh ky) or (thanh ky)) nang x hoi. ((hieu vi) OR (hieu voi)) pham duc va hanh vi luu tru*.