Perhaps you should try some spelling variations:
canh trinh » canh tranh, hanh trinh, canh tinh
hien xanh » hien hanh, hien nhanh, chieu xanh
hang cong » dang cong, hang nong, thanh cong
bang cong » dang cong, bang song, dung cong
trinh va » trinh van, trinh vat, trinh ve
tap doan » tap quan
doan ban » doanh ban, toan ban, doan van

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 - canh trinh va ((hang cong) OR (bang cong)) tap doan ban~.
• Adding a wildcard symbol may retrieve word variants: hoc hien xanh - canh trinh va ((hang cong) or (bang cong)) tap doan ban*.