Perhaps you should try some spelling variations:
hoc nhanh » hoc nganh, hoc phan
hieu viec » nhieu viec, hieu ve, sieu viet
nhanh ky » hanh ky, nhan ky, nganh ky
viec cac » vien cac, viec cua, viec lam
hanh tri » thanh tri, hanh tai, hanh trinh
ky lang » ky nang, ky dang, ky tang
van hoi » van hoc, van hoe, van loi
cac duc » cac du, cao duc, cac dac
va hanh » van hanh, va thanh, va danh
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: hoc nhanh ky lang ((van hoi) or (van hoa)). hieu viec cac duc va hanh tri cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc nhanh ky lang ((van hoi) OR (van hoa)). hieu viec cac duc va hanh tri cua tre.
• Adding a wildcard symbol may retrieve word variants: hoc nhanh ky lang ((van hoi) or (van hoa)). hieu viec cac duc va hanh tri cua tre*.