Perhaps you should try some spelling variations:
cham luc » cham soc, nhan luc, cham cuu
van hanh » van thanh, ban hanh, van anh
hanh lai » hanh lam, hanh tai, thanh lap
vu sach » vu bach, su sach, vu khach
ty mang » ty hang, tin mang, tri mang
tay hoi » tay ho, tao hoi, tay thai
hieu ve » hieu va, hieu van
ve cham » va cham, ve chat, vu cham
luc van » luoc van, luu van, duc van
lai va » loai va, mai va, dai va
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: vu sach ((ty mang) OR (ty xang)) tay hoi. hieu ve cham luc van hanh lai va thiet~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "vu sach ((ty mang) OR (ty xang)) tay hoi. hieu ve cham luc van hanh lai va thiet".
• Adding a wildcard symbol may retrieve word variants: vu sach ((ty mang) OR (ty xang)) tay hoi. hieu ve cham luc van hanh lai va thiet*.