Perhaps you should try some spelling variations:
cham luc » cham soc, nhan luc, cham cuu
qua cham » qua hai, qua cac, va cham
va tinh » may tinh
va hanh » van hanh, va thanh, va danh
cua tre » cua te, cuu tre, cua triet
tu bat » tu ban, tu dat
di cua » dai cua, doi cua, de cua
tu sai » tu bai, tu san, tu cai
x hoi » xa hoi, o hoi, x ho

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((tu sai) or (tu bat)) ky nang x hoi. hieu qua cham luc ((va hanh) or (va tinh)) di cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sai) OR (tu bat)) ky nang x hoi. hieu qua cham luc ((va hanh) OR (va tinh)) di cua tre.
• Adding a wildcard symbol may retrieve word variants: ((tu sai) or (tu bat)) ky nang x hoi. hieu qua cham luc ((va hanh) or (va tinh)) di cua tre*.