Perhaps you should try some spelling variations:
danh nhan » doanh nhan, thanh nhan, benh nhan
cua viet » ca viet, hoa viet, cua vat
nam thuc » nam thuoc, am thuc, nam thu
dao hanh » dao thanh, dang hanh, ban hanh
hieu va » lieu va, hieu qua
lang xa » lang ha, dang xay, lang van
sach ky » sac ky, sach y, sach ty
ky lang » ky nang, ky dang, ky tang
cua tre » cua te, cuu tre, cua triet
vu sach » vu bach, su sach, vu khach
va nam » van nam, ha nam, va nay

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

• Performing a fuzzy search may retrieve terms with similar spellings: vu sach ky lang xa hoi. hieu va nam thuc ((dao hanh) or (danh nhan)) di ((cua tre) or (cua viet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: vu sach ky lang xa hoi. hieu va nam thuc ((dao hanh) OR (danh nhan)) di ((cua tre) OR (cua viet)).
• Adding a wildcard symbol may retrieve word variants: vu sach ky lang xa hoi. hieu va nam thuc ((dao hanh) or (danh nhan)) di ((cua tre) or (cua viet))*.