Perhaps you should try some spelling variations:
thieu xanh » chieu xanh, hieu manh, thien anh
hanh tranh » canh tranh, hanh trinh, hanh trang
hoc thieu » toc thieu, hoc hien
tranh cua » doanh cua, manh cua
cua thong » cua thuong, cua khong, cua tong
song cao » song ca, song cau, song co
dong cao » duong cao, dong co, dong cho
cong cao » cong cau, cong cac, cong co
chat cau » chat cam, chat cao, chat va

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

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