Perhaps you should try some spelling variations:
hien nhanh » hien hanh, thien thanh, tien thanh
hanh trinh » canh tranh, hanh chinh
hien xanh » hien hanh, chieu xanh, hien khanh
dung cong » dung trong
trinh tu » trinh ky, trinh do
cong tac » cong ty
toan tai » toan tap, doanh tai, toan ban
toan cao » toan ban, toan tap
tu dung » tuc dung, tu duong, su dung

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: hoc ((hien xanh) OR (hien nhanh)) - hanh trinh tu dung cong tac ((toan tai) OR (toan cao))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((hien xanh) OR (hien nhanh)) - hanh trinh tu dung cong tac ((toan tai) or (toan cao))~".
• Adding a wildcard symbol may retrieve word variants: hoc ((hien xanh) OR (hien nhanh)) - hanh trinh tu dung cong tac ((toan tai) or (toan cao))*.