Perhaps you should try some spelling variations:
thu sach » tu sach, thuat sach, thuoc sach
mai khoi » mai khoa, tai khoa, cac khoi
cham luc » cham soc, nhan luc, cham cuu
mai hoi » dai hoi, lai hoi, mai doi
hieu vu » hieu va, hieu ve, hieu su
vai cau » va cau, vai cac, lai chau
van cau » van dau, van hau, van chat
vu cham » va cham, vu kham, tu cham
y nang » ky nang, ly nang, v nang
luc va » duc va, tuc va, loc va
va dan » ca dan, va dao, va dau

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

• Performing a fuzzy search may retrieve terms with similar spellings: thu sach y nang ((mai hoi) or (mai khoi)). hieu vu cham luc va dan ((vai cau) or (van cau)) tren~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu sach y nang ((mai hoi) OR (mai khoi)). hieu vu cham luc va dan ((vai cau) OR (van cau)) tren.
• Adding a wildcard symbol may retrieve word variants: thu sach y nang ((mai hoi) or (mai khoi)). hieu vu cham luc va dan ((vai cau) or (van cau)) tren*.