Perhaps you should try some spelling variations:
chieu sang » chieu xanh, hieu lang, nhieu tang
chieu sach » chinh sach, chiet tach, chieu xanh
canh trinh » canh tranh, hanh trinh, canh tinh
nhung cong » dung cong, thong cong, nhung don
hang cong » dang cong, hang nong, bang cong
trinh ve » trinh he, trinh va, trinh vi
van phan » van phong, van thanh, luan phan
phan cau » phan dau, phan cac, phan tu

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 (chieu sach)) - canh trinh ve ((nhung cong) OR (hang cong)) van phan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho ((chieu sang) OR (chieu sach)) - canh trinh ve ((nhung cong) OR (hang cong)) van phan cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho ((chieu sang) or (chieu sach)) - canh trinh ve ((nhung cong) OR (hang cong)) van phan cau".
• Adding a wildcard symbol may retrieve word variants: ho ((chieu sang) or (chieu sach)) - canh trinh ve ((nhung cong) OR (hang cong)) van phan cau*.