Perhaps you should try some spelling variations:
thanh trung » thanh tung
chieu xanh » chieu sach, chieu sang, chieu tinh
cong thanh » dong thanh, cong trinh, cong tan
trung hoc » trung quoc
hoc thong » hoc thuong, hoc trong, hoc hong
cong manh » cong danh, duong manh, hoang manh
ho chieu » theo chieu, hoc thieu, doi chieu
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: ho chieu xanh - thanh trung hoc thong ((cong manh) or (cong thanh)) toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho chieu xanh - thanh trung hoc thong ((cong manh) OR (cong thanh)) toan cau.
• Adding a wildcard symbol may retrieve word variants: ho chieu xanh - thanh trung hoc thong ((cong manh) or (cong thanh)) toan cau*.