Perhaps you should try some spelling variations:
cau luc » cau truc, cau phuc
ky dang » ky nang, ky danh
lap hai » lap tai, lap hoat, lanh hai
dinh vi » dinh ve, dinh viet, dinh tri
lap lai » lap tai, lay lai, lam lai
hieu ve » hieu van
va dinh » van dinh, va kinh, va tinh
hieu va » lieu va, hieu qua
su sac » su sach, su cac, su xac
vi cua » vai cua, di cua
luc va » duc va, tuc va, loc va
cua te » cua tu
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 dang ((lap hai) or (lap lai)). ((hieu ve) or (hieu va)) cau luc va dinh vi cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sac ky dang ((lap hai) OR (lap lai)). ((hieu ve) OR (hieu va)) cau luc va dinh vi cua te.
• Adding a wildcard symbol may retrieve word variants: su sac ky dang ((lap hai) or (lap lai)). ((hieu ve) or (hieu va)) cau luc va dinh vi cua te*.