Perhaps you should try some spelling variations:
chieu sang » chieu sach, chieu xanh, hieu lang
chiet tach » chieu sach
thong cong » trong cong, tong cong, thong thong
hanh dinh » thanh dinh, hinh dinh, hanh tinh
dung cong » dung trong
dinh thi » dinh tri
van toan » van tuan, van tan, van 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: ho ((chieu sang) or (chiet tach)) - hanh dinh thi ((dung cong) or (thong cong)) van toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho ((chieu sang) OR (chiet tach)) - hanh dinh thi ((dung cong) OR (thong cong)) van toan cau.
• Adding a wildcard symbol may retrieve word variants: ho ((chieu sang) or (chiet tach)) - hanh dinh thi ((dung cong) or (thong cong)) van toan cau*.