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
mai hoi » mai khoi, dai hoi, lai hoi
cua tre » cua te, cuu tre, cua triet
y nang » ky nang, ly nang, v nang
luc va » duc va, tuc va, loc va
ma hoi » xa hoi, me hoi, va hoi

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