Perhaps you should try some spelling variations:
cham luc » cham soc, nhan luc, cham cuu
va doanh » van doanh, vay doanh, va danh
doanh va » doan va, doanh tai, doanh cua
tu sach » thu sach, su sach, te sach
sach ky » sac ky, sach y, sach ty
nang ma » sang ma, nang cao, mang may
tang ma » mang may, tang van
hieu ve » hieu va, hieu van
ve cham » va cham, ve chat, vu cham
luc va » duc va, tuc va, loc va
va cua » va chua, via cua, ca cua
cua tu » cua tuc, cua su, cua cu

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: tu sach ky ((nang ma) OR (tang ma)) hoi. hieu ve cham luc va doanh va cua tu~.
• Adding a wildcard symbol may retrieve word variants: tu sach ky ((nang ma) or (tang ma)) hoi. hieu ve cham luc va doanh va cua tu*.