Perhaps you should try some spelling variations:
hanh doi » thanh doi, hanh noi, hang doi
nhan luc » nang luc
qua nhan » cua nhan, qua nhat, qua phan
su sach » so sach, vu sach
doi cua » dai cua, hoi cua
va hanh » van hanh, va thanh, va danh
cua tre » cua te, cuu tre, cua triet
ma hoi » mai hoi, xa hoi, me hoi
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) OR (ma hoa)). hieu qua nhan luc va hanh doi cua tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ((ky nang) or (ki nang)) ((ma hoi) OR (ma hoa)). hieu qua nhan luc va hanh doi cua tre~".
• Adding a wildcard symbol may retrieve word variants: su sach ((ky nang) or (ki nang)) ((ma hoi) OR (ma hoa)). hieu qua nhan luc va hanh doi cua tre*.