Perhaps you should try some spelling variations:
cham luc » nhan luc, cham cuu, chat lua
tu sach » thu sach, su sach, te sach
danh di » danh du, xanh di, danh dien
va danh » va dinh, va dan, va hanh
sach va » sach xa, sach ha, sach dao
hieu va » lieu va, hieu qua
tang ma » mang may, tang van
di cua » dai cua, doi cua, de 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 va ((nang x) OR (tang ma)) hoi. hieu va ((cham luc) OR (cham soc)) va danh di cua vat~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach va ((nang x) or (tang ma)) hoi. hieu va ((cham luc) OR (cham soc)) va danh di cua vat~".
• Adding a wildcard symbol may retrieve word variants: tu sach va ((nang x) or (tang ma)) hoi. hieu va ((cham luc) OR (cham soc)) va danh di cua vat*.