Perhaps you should try some spelling variations:
cham luc » cham soc, nhan luc, cham cuu
van hanh » van thanh, ban hanh, van anh
hanh tri » thanh tri, hanh tai, hanh trinh
sach ky » sach y, sach ty, sach kem
nang ma » tang ma, sang ma, nang cao
hieu vu » hieu va, hieu ve, hieu su
vu cham » va cham, vu kham, tu cham
luc van » luoc van, luu van, duc van
sac ky » cac ky, sai ky
ma hoi » mai hoi, xa hoi, ma hoa
thiet » thieu

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu ((sach ky) OR (sac ky)) nang ma hoi. hieu vu cham luc van hanh tri va thiet~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu ((sach ky) OR (sac ky)) nang ma hoi. hieu vu cham luc van hanh tri va thiet".
• Adding a wildcard symbol may retrieve word variants: tu ((sach ky) OR (sac ky)) nang ma hoi. hieu vu cham luc van hanh tri va thiet*.