Perhaps you should try some spelling variations:
thanh trung » thanh tung
chieu sach » chinh sach, chiet tach, chieu sang
doi chieu » doc hieu, doi chi, ho chieu
va phuong » va thuong, cac phuong
cong manh » cong danh, duong manh, cong thanh
manh toan » thanh toan, anh tuan, tinh toan
va duong » van duong, va tuong, va huong
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: doi chieu sach - thanh trung ((va duong) or (va phuong)) cong manh toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi chieu sach - thanh trung ((va duong) OR (va phuong)) cong manh toan cau.
• Adding a wildcard symbol may retrieve word variants: doi chieu sach - thanh trung ((va duong) or (va phuong)) cong manh toan cau*.