Perhaps you should try some spelling variations:
doanh thai » doanh tai, doanh thanh, doanh nhan
cua triet » cua viet, su triet, va triet
vay doanh » van doanh, ly doanh, voi doanh
nhan luc » nang luc
cua tre » cua te, cuu tre, dua tren
luc vay » luc va, luc van, luoc van
su sach » so sach, vu sach
sach ky » sac ky, sach y, sach ty
hieu tu » chieu tu, hieu tuc, hien tu
nang ma » tang ma, sang ma, nang cao
nang xa » nang x, lang xa, mang xa
tu nhan » tue nhan, cu nhan, tu ngan

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: su sach ky ((nang xa) or (nang ma)) hoi. hieu tu nhan luc vay doanh thai ((cua tre) OR (cua triet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ky ((nang xa) OR (nang ma)) hoi. hieu tu nhan luc vay doanh thai ((cua tre) OR (cua triet)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ky ((nang xa) or (nang ma)) hoi. hieu tu nhan luc vay doanh thai ((cua tre) OR (cua triet))".
• Adding a wildcard symbol may retrieve word variants: su sach ky ((nang xa) or (nang ma)) hoi. hieu tu nhan luc vay doanh thai ((cua tre) OR (cua triet))*.