Perhaps you should try some spelling variations:
nhan luc » nang luc
qua nhan » cua nhan, qua nhat, qua phan
hanh noi » ha noi, hanh vi, nang noi
hanh doi » thanh doi, hang doi, hanh moi
su sach » so sach, vu sach
cua tre » cua te, cuu tre, cua triet
ma hoi » mai hoi, xa hoi, ma hoa
luc va » duc va, tuc va, loc va

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