Perhaps you should try some spelling variations:
chieu xanh » chieu sach, chieu sang, chieu tinh
hanh trang » thanh trung, canh tranh, hanh trinh
trong quan » thong quan, tong quan, thong quang
hien xanh » hien hanh, hien nhanh, hien khanh
trang cua » tranh cua, tang cua, trung cua
cua thuoc » nha thuoc, cay thuoc, cua nuoc
trong tan » trong cac, trong ca, cong tan
toan cau » 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 (chieu xanh)) - hanh trang cua thuoc ((trong tan) OR (trong quan)) toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((hien xanh) OR (chieu xanh)) - hanh trang cua thuoc ((trong tan) OR (trong quan)) toan cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((hien xanh) or (chieu xanh)) - hanh trang cua thuoc ((trong tan) OR (trong quan)) toan cau".
• Adding a wildcard symbol may retrieve word variants: hoc ((hien xanh) or (chieu xanh)) - hanh trang cua thuoc ((trong tan) OR (trong quan)) toan cau*.