Perhaps you should try some spelling variations:
doanh thai » doanh tai, doanh thanh, doanh nhan
vay doanh » van doanh, ly doanh, voi doanh
nhan luc » nang luc
thai cua » than cua, tai cuc, tri cua
su sach » so sach, vu sach
sach ky » sac ky, sach y, sach ty
nang xa » nang x, lang xa, nang ma
tang ma » mang may, tang van
hieu vu » hieu va, hieu ve, hieu su
vu nhan » cu nhan, vu ngan, tu nhan
luc vay » luc va, luc van, luoc van
cua tre » cua te, cuu tre, cua triet

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 (tang ma)) hoi. hieu vu nhan luc vay doanh thai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ky ((nang xa) OR (tang ma)) hoi. hieu vu nhan luc vay doanh thai cua tre.
• Adding a wildcard symbol may retrieve word variants: su sach ky ((nang xa) or (tang ma)) hoi. hieu vu nhan luc vay doanh thai cua tre*.