Perhaps you should try some spelling variations:
ve triet » va trien
sach cuu » sach cua, sach luu, sach uu
cuu nang » chuc nang, cam nang, cuu van
su triet » su viet, su tien
van hanh » van thanh, ban hanh, van anh
nhan luc » nang luc
hanh ve » hanh vi, hanh va, hanh kem
luc van » luoc van, luu van, duc van
su sach » so sach, vu sach
hieu va » lieu va, hieu qua
hieu cu » hieu cua, hieu ca, hieu su
nang ma » tang ma, sang ma, nang cao
ma hoi » mai hoi, xa hoi, ma hoa

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

• Performing a fuzzy search may retrieve terms with similar spellings: su sach cuu nang ma hoi. ((hieu cu) or (hieu va)) nhan luc van hanh ve ((su triet) or (ve triet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach cuu nang ma hoi. ((hieu cu) OR (hieu va)) nhan luc van hanh ve ((su triet) OR (ve triet)).
• Adding a wildcard symbol may retrieve word variants: su sach cuu nang ma hoi. ((hieu cu) or (hieu va)) nhan luc van hanh ve ((su triet) or (ve triet))*.