Perhaps you should try some spelling variations:
van thanh » ban thanh, van tuan
qua nhan » cua nhan, qua nhat, qua phan
nhan luc » nang luc
van hanh » ban hanh, van anh, van ban
su sach » so sach, vu sach
nang ma » tang ma, sang ma, nang cao
cuu tre » cau tren, cau treo
cua tre » cua te, cua triet, dua tren
y nang » ky nang, ly nang, v nang
ma hoi » mai hoi, xa hoi, ma hoa

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 sach y nang ma hoi. hieu qua nhan luc ((van hanh) OR (van thanh)) doi ((cuu tre) OR (cua tre))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach y nang ma hoi. hieu qua nhan luc ((van hanh) or (van thanh)) doi ((cuu tre) OR (cua tre))~".
• Adding a wildcard symbol may retrieve word variants: su sach y nang ma hoi. hieu qua nhan luc ((van hanh) or (van thanh)) doi ((cuu tre) OR (cua tre))*.