Perhaps you should try some spelling variations:
khong duong » khong dung, khong xuong, thong duong
chieu sach » chinh sach, chiet tach, chieu sang
duong manh » duong van
chua xang » chua nang, chuc nang, chu bang
cua khong » hua khong, cua phuong, cua thuong
anh dung » anh dong, anh huong, sach dung
dung cua » dung luan, dung cho
toan cau » toan ban, toan tap, toan tai
toan cao » toan ban, toan tap

You may be able to get more results by adjusting your search query.

• If you are trying to use Boolean operators, they must be ALL CAPS: theo ((chieu sach) OR (chua xang)) - anh dung cua khong duong manh ((toan cau) OR (toan cao))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo ((chieu sach) or (chua xang)) - anh dung cua khong duong manh ((toan cau) OR (toan cao))~".
• Adding a wildcard symbol may retrieve word variants: theo ((chieu sach) or (chua xang)) - anh dung cua khong duong manh ((toan cau) OR (toan cao))*.