Perhaps you should try some spelling variations:
cua nhan » ca nhan, cua ngan, cua nha
hieu cua » hieu qua, dieu cua, bieu cua
hang doi » hang di, hang loi, huong doi
nhan luc » nang luc
cuu tre » cua tre, cau tren, cau treo
va hang » van hang, va nang, va lang
su sach » vu sach
so sach » so sanh, bo sach, co sach
luc va » duc va, tuc va, loc va
nang o » nang co, nang ho, nang ro
cua te » cua tu
o hoi » co hoi, o hoc, o hai

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