Perhaps you should try some spelling variations:
thanh trung » thanh tung
trung tuong » trung uong, trong tuong, trung trong
tuong luong » thuong luong, tuong duong, trong luong
thieu sang » chieu sang, thieu khang, thieu quang
chieu xanh » chieu sach, chieu sang, chieu tinh
cong manh » duong manh, cong thanh, hoang manh
cong danh » cuong danh, cong dan, cong thanh
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 sang) or (chieu xanh)) - thanh trung tuong luong ((cong manh) or (cong danh)) toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((thieu sang) OR (chieu xanh)) - thanh trung tuong luong ((cong manh) OR (cong danh)) toan cau.
• Adding a wildcard symbol may retrieve word variants: hoc ((thieu sang) or (chieu xanh)) - thanh trung tuong luong ((cong manh) or (cong danh)) toan cau*.