Perhaps you should try some spelling variations:
thanh trung » thanh tung
chieu sang » chieu sach, chieu xanh, hieu lang
chon chung » cho chuong, cho nhung, cong chung
hoc chieu » hoc thieu, ho chieu, hoc hien
cong danh » cuong danh, cong dan, cong thanh
danh toan » manh toan, anh toan, dan toan
co nhung » cho nhung, bo nhung, so nhung
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 chieu sang - thanh trung ((co nhung) or (chon chung)) cong danh toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc chieu sang - thanh trung ((co nhung) OR (chon chung)) cong danh toan cau.
• Adding a wildcard symbol may retrieve word variants: hoc chieu sang - thanh trung ((co nhung) or (chon chung)) cong danh toan cau*.