Perhaps you should try some spelling variations:
toc sach » hoc sach, doc sach, thuoc sach
voi nang » voi hang, hoi nang, voi rang
cham luc » cham soc, nhan luc, cham cuu
vuc nang » cuc nang, vu nang, chuc nang
va nang » van nang, da nang, cam nang
hieu va » lieu va, hieu qua
va cham » va chat, va tham
va hanh » van hanh, va thanh, va danh
hanh de » hanh ve, hanh kem
luc va » duc va, tuc va, loc va
de cua » le cua, te cua, dieu cua
cua te » cua tu

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

• Performing a fuzzy search may retrieve terms with similar spellings: toc sach ((((vuc nang) or (voi nang))) or (va nang)) xa hoi. hieu va cham luc va hanh de cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc sach ((((vuc nang) OR (voi nang))) OR (va nang)) xa hoi. hieu va cham luc va hanh de cua te.
• Adding a wildcard symbol may retrieve word variants: toc sach ((((vuc nang) or (voi nang))) or (va nang)) xa hoi. hieu va cham luc va hanh de cua te*.