Perhaps you should try some spelling variations:
cua nhan » ca nhan, cua ngan, cua nha
hieu cua » hieu qua, dieu cua, bieu cua
nhan luc » nang luc
hoi cua » hoi chuc
doi cua » dai cua
va danh » va dinh, va dan, va hanh
su sach » so sach, vu sach
y nang » ky nang, ly nang, may nang
ma hoi » mai hoi, xa hoi, ma hoa
luc va » duc va, tuc va, loc va
v nang » va nang, vu nang, van nang

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