Perhaps you should try some spelling variations:
nhan luc » nang luc
ly quang » le quang, vu quang
hieu ve » hieu va, hieu van
danh va » doanh va, hanh va, anh va
va danh » va dinh, va dan, va hanh
ve nhan » ve nha, de nhan, va nhan
tu sach » thu sach, su sach, te sach
cua tre » cua te, cuu tre, cua triet
luc va » duc va, tuc va, loc va
va cua » va chua, via cua, ca cua

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: tu sach ((ty xang) OR (((ly hang) OR (ly quang)))) xa hoi. hieu ve nhan luc va danh va cua tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ((ty xang) or (((ly hang) OR (ly quang)))) xa hoi. hieu ve nhan luc va danh va cua tre~".
• Adding a wildcard symbol may retrieve word variants: tu sach ((ty xang) or (((ly hang) OR (ly quang)))) xa hoi. hieu ve nhan luc va danh va cua tre*.