Perhaps you should try some spelling variations:
hien xanh » hien hanh, hien nhanh, chieu xanh
hanh mang » nhanh mang, hanh trang, nhanh lang
dung cong » dung trong
cong vinh » cong trinh, trong vinh, cong viec
mang tin » nang tin, mang ten, bang tien
toan ban » van ban
toan cao » toan tap

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 mang tin dung cong vinh ((toan ban) OR (toan cao))~.
• Adding a wildcard symbol may retrieve word variants: hoc hien xanh - hanh mang tin dung cong vinh ((toan ban) or (toan cao))*.