Perhaps you should try some spelling variations:
hieu quan » lieu quan, thien quan, lien quan
hanh hai » thanh hai, nhanh hai, hang hai
van hanh » van thanh, ban hanh, van anh
cua tre » cua te, cuu tre, cua triet
luc van » luoc van, luu van, duc van
ky lang » ky nang, ky dang, ky tang
lang xa » lang ha, dang xay, lang van
hieu ve » hieu va, hieu van
hai cua » thai cua, dai cua, hoi cua
cam luc » cam xuc, cau luc
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 lang xa hoi. ((((hieu ve) or (hieu qua))) or (hieu quan)) cam luc van hanh hai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sac ky lang xa hoi. ((((hieu ve) OR (hieu qua))) OR (hieu quan)) cam luc van hanh hai cua tre.
• Adding a wildcard symbol may retrieve word variants: su sac ky lang xa hoi. ((((hieu ve) or (hieu qua))) or (hieu quan)) cam luc van hanh hai cua tre*.