Perhaps you should try some spelling variations:
su triet » su viet, su tien, ve triet
hieu cac » hieu luc, hieu va, hieu van
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
sach vu » sach va, sach tu, sach uu
hieu cu » hieu cua, hieu ca, hieu su
nang ma » tang ma, sang ma, nang cao
vu nang » vuc nang, va nang, vu dang
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.

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