Perhaps you should try some spelling variations:
thieu xanh » hieu manh, thien anh, thien danh
chieu xanh » chieu sach, chieu sang, chieu tinh
trang luan » tang luan, tranh luan, trang tuan
trinh luan » trinh luat, trinh quan, trinh han
duong manh » duong van
ung duong » ung dung, tuong duong, cuong duong
manh toan » thanh toan, anh tuan, tinh toan
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 ((thieu xanh) OR (chieu xanh)) - hanh ((trang luan) or (trinh luan)) ung duong manh toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((thieu xanh) OR (chieu xanh)) - hanh ((trang luan) OR (trinh luan)) ung duong manh toan cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((thieu xanh) OR (chieu xanh)) - hanh ((trang luan) or (trinh luan)) ung duong manh toan cau".
• Adding a wildcard symbol may retrieve word variants: hoc ((thieu xanh) OR (chieu xanh)) - hanh ((trang luan) or (trinh luan)) ung duong manh toan cau*.