Perhaps you should try some spelling variations:
hanh trinh » canh tranh, hanh chinh
hien xanh » hien hanh, hien nhanh, chieu xanh
dung cong » dung trong
trinh su » trinh tu, trinh san, trinh cau
cong tac » cong ty
toan tai » doanh tai, toan ban, von tai
toan tap » toan ban
toan cao » toan ban

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