Perhaps you should try some spelling variations:
hanh trung » thanh trung, hanh trang, manh trung
hien xanh » hien nhanh, chieu xanh, hien khanh
hien hanh » dieu hanh
trung cua » truong cua, trung tuan, trung cap
cua thong » cua thuong, cua khong, cua tong
dien toan » dien thanh, dien thoai, dien hoa
den toan » dan toan, den tran, den tuan

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 hanh)) - hanh trung cua thong thong ((den toan) OR (dien toan)) cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((hien xanh) OR (hien hanh)) - hanh trung cua thong thong ((den toan) OR (dien toan)) cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((hien xanh) or (hien hanh)) - hanh trung cua thong thong ((den toan) OR (dien toan)) cau".
• Adding a wildcard symbol may retrieve word variants: hoc ((hien xanh) or (hien hanh)) - hanh trung cua thong thong ((den toan) OR (dien toan)) cau*.