Perhaps you should try some spelling variations:
cham luc » cham soc, nhan luc, cham cuu
cuu tre » cua tre, cau tren, cau treo
va hanh » van hanh, va thanh, va danh
va cham » va chat, va tham
hieu va » lieu va, hieu qua
dai hoi » dai hoc, dai hai, dai moi
mai hoi » mai khoi, lai hoi, mai doi
bai ky » ban ky, sai ky, bac ky
luc va » duc va, tuc va, loc va
vi cuu » vi luu, vinh cuu
tu bai » tu ban, tu bat, te bai

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu bai ky nang ((ma hoa) or (((mai hoi) or (dai hoi)))). hieu va cham luc va hanh vi cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu bai ky nang ((ma hoa) OR (((mai hoi) OR (dai hoi)))). hieu va cham luc va hanh vi cuu tre.
• Adding a wildcard symbol may retrieve word variants: tu bai ky nang ((ma hoa) or (((mai hoi) or (dai hoi)))). hieu va cham luc va hanh vi cuu tre*.