Perhaps you should try some spelling variations:
su triet » su viet, su tien, ve triet
nhan luc » nang luc
van hanh » van thanh, ban hanh, van anh
vu nang » vuc nang, va nang, vu dang
nang ma » tang ma, sang ma, nang cao
hieu su » hieu sau, tieu su, hieu so
su nhan » cu nhan, tu nhan, su nha
so sach » so sanh, bo sach, co sach
luc van » luoc van, luu van, duc van
hanh ve » hanh vi, hanh va, hanh kem
su sach » vu sach
ma hoi » mai hoi, xa hoi, ma hoa
ve su » va su

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: ((su sach) OR (so sach)) vu nang ma hoi. hieu su nhan luc van hanh ve su triet~.
• Adding a wildcard symbol may retrieve word variants: ((su sach) or (so sach)) vu nang ma hoi. hieu su nhan luc van hanh ve su triet*.