Perhaps you should try some spelling variations:
trong vang » trong van, trong dang, trong tang
chieu sach » chiet tach, chieu sang, chieu xanh
hang luan » dung luan
tang luan » dung luan
vang toan » van toan, dang toan, quang toan
van dung » van dong, xay dung, tin dung
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 sach) or (chinh sach)) - ((hang luan) OR (tang luan)) van dung trong vang toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho ((chieu sach) OR (chinh sach)) - ((hang luan) OR (tang luan)) van dung trong vang toan cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho ((chieu sach) or (chinh sach)) - ((hang luan) OR (tang luan)) van dung trong vang toan cau".
• Adding a wildcard symbol may retrieve word variants: ho ((chieu sach) or (chinh sach)) - ((hang luan) OR (tang luan)) van dung trong vang toan cau*.