Perhaps you should try some spelling variations:
quang thanh » quan thanh, hoang thanh, muong thanh
thanh trung » thanh tung
chieu xanh » chieu sach, chieu sang, chieu tinh
cong quang » luong quang, thong quang, duong quang
hieu manh » hieu nganh, dieu hanh, hien hanh
cap nhung » cam nhung, vap nhung, canh nhung
dap nhung » vap nhung, va nhung, dap ung
thanh cau » thanh chau, thanh mau, nhanh cau

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: hoc ((hieu manh) or (chieu xanh)) - thanh trung ((cap nhung) OR (dap nhung)) cong quang thanh cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((hieu manh) OR (chieu xanh)) - thanh trung ((cap nhung) OR (dap nhung)) cong quang thanh cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((hieu manh) or (chieu xanh)) - thanh trung ((cap nhung) OR (dap nhung)) cong quang thanh cau".
• Adding a wildcard symbol may retrieve word variants: hoc ((hieu manh) or (chieu xanh)) - thanh trung ((cap nhung) OR (dap nhung)) cong quang thanh cau*.