Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
doanh van » doan van, doanh va, doanh ban
va doanh » van doanh, vay doanh, va danh
nhan luc » nang luc
cua tre » cua te, cuu tre, dua tren
ve nhan » ve nha, de nhan, va nhan
tu sach » thu sach, su sach, te sach
sach lo » sach dao, sach doi, sach hoi
nang ma » tang ma, sang ma, nang cao
nang xa » nang x, lang xa, mang xa
hieu ve » hieu va, hieu van
luc va » duc va, tuc va, loc va

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 lo ((nang xa) OR (nang ma)) hoi. hieu ve nhan luc va doanh van ((cua tre) OR (cua triet))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach lo ((nang xa) OR (nang ma)) hoi. hieu ve nhan luc va doanh van ((cua tre) or (cua triet))~".
• Adding a wildcard symbol may retrieve word variants: tu sach lo ((nang xa) OR (nang ma)) hoi. hieu ve nhan luc va doanh van ((cua tre) or (cua triet))*.