Perhaps you should try some spelling variations:
khong cong » thong cong, khong cang, chong cong
hien xanh » hien hanh, hien nhanh, chieu xanh
tranh cua » doanh cua, manh cua
cua khong » hua khong, cua phuong, cua thuong
thanh cac » hanh cac, thanh bac, thanh ca
cong van » cong vang, cong san, song van
khan cap » khan ap, than cap, khoan cam

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc hien xanh - canh tranh cua khong cong van ((khan cap) or (thanh cac))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc hien xanh - canh tranh cua khong cong van ((khan cap) OR (thanh cac)).
• Adding a wildcard symbol may retrieve word variants: hoc hien xanh - canh tranh cua khong cong van ((khan cap) or (thanh cac))*.