Perhaps you should try some spelling variations:
hien nhanh » hien hanh, thien thanh, tien thanh
chat chong » chat phong, chat luong, chat long
chong cong » cong cong, thong cong, cuong cong
thanh toan » thanh san, tinh toan
hien xanh » hien hanh, chieu xanh, hien khanh
hanh tinh » hanh trinh, nhanh tinh, thanh tinh
thanh hoa » thanh pho

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) or (hien nhanh)) - hanh tinh chat chong cong ((thanh toan) OR (thanh hoa)) cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((hien xanh) OR (hien nhanh)) - hanh tinh chat chong cong ((thanh toan) OR (thanh hoa)) cao*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((hien xanh) or (hien nhanh)) - hanh tinh chat chong cong ((thanh toan) OR (thanh hoa)) cao*".