Perhaps you should try some spelling variations:
hieu cua » hieu qua, dieu cua, bieu cua
cua nhan » ca nhan, cua ngan, cua nha
nhan luc » nang luc
hanh doi » thanh doi, hanh noi, hang doi
su sach » so sach, vu sach
va hanh » van hanh, va thanh, va danh
doi cua » dai cua, hoi cua
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 cua nhan luc va hanh doi cua tre~.
• Adding a wildcard symbol may retrieve word variants: su sach ((ky nang) or (ki nang)) ma hoi. hieu cua nhan luc va hanh doi cua tre*.