Perhaps you should try some spelling variations:
day nhanh » day thanh, duy nhanh, dac nhan
vu khach » vu khanh, vu khac, vay khach
khach ky » hanh ky, thanh ky
cac thuc » cach thuc, cac thu, can thuc
ban hanh » ban hang
nang xa » nang x, lang xa, nang ma
hieu va » lieu va, hieu qua
cua tre » cua te, cuu tre, cua triet
di cua » dai cua, doi cua, de cua

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

• Performing a fuzzy search may retrieve terms with similar spellings: vu khach ky nang xa hoi. hieu va cac thuc ((ban hanh) or (day nhanh)) di cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: vu khach ky nang xa hoi. hieu va cac thuc ((ban hanh) OR (day nhanh)) di cua tre.
• Adding a wildcard symbol may retrieve word variants: vu khach ky nang xa hoi. hieu va cac thuc ((ban hanh) or (day nhanh)) di cua tre*.