Perhaps you should try some spelling variations:
nhan luc » nang luc
tang van » dang van, hoang van, trong van
cham luc » cham soc, cham cuu, chat lua
day cua » dai cua
dau cua » dai cua, cau cua, dan cua
va danh » va dinh, va dan, va hanh
te sach » toc sach
hieu va » lieu va, hieu qua
van hoi » van hoa, van hoc, van hoe
y tang » ky tang, 6 tang, 7 tang

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: te sach y tang van hoi. hieu va ((cham luc) OR (nhan luc)) va danh ((dau cua) OR (day cua)) triet~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach y tang van hoi. hieu va ((cham luc) or (nhan luc)) va danh ((dau cua) OR (day cua)) triet~".
• Adding a wildcard symbol may retrieve word variants: te sach y tang van hoi. hieu va ((cham luc) or (nhan luc)) va danh ((dau cua) OR (day cua)) triet*.