Perhaps you should try some spelling variations:
qua cham » qua hai, qua cac, va cham
cham luc » cham soc, nhan luc, cham cuu
hanh tai » thanh tai, hang tai, han tai
va hanh » van hanh, va thanh, va danh
tai cuu » tai cuc, tai buu, tai cua
cuu tre » cua tre, cau tren, cau treo
su sac » su sach, su cac, su xac
sac ky » cac ky, sai ky
luc va » duc va, tuc va, loc va
x hoi » xa hoi, x ho, 5 hoi
o hoi » co hoi, o hoc, o hai

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: su sac ky nang ((x hoi) OR (o hoi)). hieu qua cham luc va hanh tai cuu tre~.
• Adding a wildcard symbol may retrieve word variants: su sac ky nang ((x hoi) or (o hoi)). hieu qua cham luc va hanh tai cuu tre*.