Perhaps you should try some spelling variations:
hien nhanh » hien hanh, thien thanh, tien thanh
chat thong » chat chong, chat trong, nhat thuong
chat phong » chau phong, chat chong, chat luong
cong thanh » dong thanh, cong trinh, cong tan
thanh toan » thanh hoa, thanh san, tinh toan
hien xanh » hien hanh, chieu xanh, hien khanh
hanh tinh » hanh trinh, nhanh tinh, thanh tinh
toan cao » toan ban, toan tap

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