Perhaps you should try some spelling variations:
hien nhanh » hien hanh, thien thanh, tien thanh
thanh toan » thanh hoa, thanh san, tinh toan
hien xanh » hien hanh, chieu xanh, hien khanh
anh trong » anh thuong, dinh trong, lang trong
dung cong » dung trong
trong su » trong san, trong thu, trong qua
dan toan » van toan, dan than, manh toan

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)) - anh trong su dung cong ((dan toan) or (thanh toan)) cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((hien xanh) OR (hien nhanh)) - anh trong su dung cong ((dan toan) OR (thanh toan)) cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((hien xanh) OR (hien nhanh)) - anh trong su dung cong ((dan toan) or (thanh toan)) cau".
• Adding a wildcard symbol may retrieve word variants: hoc ((hien xanh) OR (hien nhanh)) - anh trong su dung cong ((dan toan) or (thanh toan)) cau*.