Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
van hanh » van thanh, ban hanh, van anh
nhan luc » nang luc
van nhan » van phan, van thanh, danh nhan
hieu van » hieu va, thien van, lieu va
lang xa » lang ha, dang xay, lang van
mang xa » mang may, dang xay, mang cua
luc van » luoc van, luu van, duc van
cua tre » cua te, cuu tre, dua tren
sac ky » cac ky, sai ky
te sac » te sach, te cac, te san

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

• If you are trying to use Boolean operators, they must be ALL CAPS: te sac ky ((mang xa) OR (lang xa)) hoi. hieu van nhan luc van hanh kem ((cua tre) OR (cua triet))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sac ky ((mang xa) or (lang xa)) hoi. hieu van nhan luc van hanh kem ((cua tre) OR (cua triet))~".
• Adding a wildcard symbol may retrieve word variants: te sac ky ((mang xa) or (lang xa)) hoi. hieu van nhan luc van hanh kem ((cua tre) OR (cua triet))*.