Perhaps you should try some spelling variations:
cua triet » cua viet, va triet
su triet » su viet, su tien, ve triet
van hanh » van thanh, ban hanh, van anh
cham luc » cham soc, nhan luc, cham cuu
luc van » luoc van, luu van, duc van
vu sach » vu bach, su sach, vu khach
nang xa » nang x, lang xa, mang xa
nang ma » tang ma, sang ma, nang cao
va cham » va chat, va tham

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: vu sach y ((nang xa) OR (nang ma)) hoi. lieu va cham luc van hanh vi ((cua triet) OR (su triet))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "vu sach y ((nang xa) or (nang ma)) hoi. lieu va cham luc van hanh vi ((cua triet) OR (su triet))~".
• Adding a wildcard symbol may retrieve word variants: vu sach y ((nang xa) or (nang ma)) hoi. lieu va cham luc van hanh vi ((cua triet) OR (su triet))*.