Perhaps you should try some spelling variations:
thu sach » tu sach, thuat sach, thuoc sach
nhan luc » nang luc
cua viet » ca viet, hoa viet, cua dieu
va doanh » van doanh, vay doanh, va danh
ly nang » ky nang, ly hang, ly vang
nang xa » nang x, lang xa, nang ma
hieu va » lieu va, hieu qua
va nhan » van nhan, ca nhan, va phan
sach ly » sach y, sach lo, sach ty
va doan » van doan, va dan, va don

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: thu sach ly nang xa hoi. hieu va nhan luc ((va doan) OR (va doanh)) va ((cua viet) OR (cua vat))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thu sach ly nang xa hoi. hieu va nhan luc ((va doan) OR (va doanh)) va ((cua viet) or (cua vat))~".
• Adding a wildcard symbol may retrieve word variants: thu sach ly nang xa hoi. hieu va nhan luc ((va doan) OR (va doanh)) va ((cua viet) or (cua vat))*.