Perhaps you should try some spelling variations:
tan hanh » tan thanh, tang hanh, toan hanh
cua viet » ca viet, hoa viet, cua vat
ky lang » ky nang, ky dang, ky tang
qua cac » cua cac
cac duc » cac du, cao duc, cac dac
hanh de » hanh ve, hanh kem
tu van » tu va
ha hoi » hoa hoi, xa hoi, va hoi
de cua » le cua, te cua, dieu cua

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 van ky lang ((ha hoi) OR (ha noi)). hieu qua cac duc tan hanh de cua viet~.
• Adding a wildcard symbol may retrieve word variants: tu van ky lang ((ha hoi) or (ha noi)). hieu qua cac duc tan hanh de cua viet*.