Perhaps you should try some spelling variations:
trinh phuong » trinh duong, trinh dung, trinh cong
phuong cham » phuong phap, phuong thao
chieu sach » chiet tach, chieu sang, chieu xanh
hanh mang » nhanh mang, hanh trang, nhanh lang
mang luan » tang luan, hang luan, bang luan
luan tong » luan tuong, luan cong, luan dong
tong cong » trong cong, cong cong, dung cong

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

• Performing a fuzzy search may retrieve terms with similar spellings: theo ((chieu sach) or (chinh sach)) - hanh mang luan tong cong trinh phuong cham~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo ((chieu sach) OR (chinh sach)) - hanh mang luan tong cong trinh phuong cham.
• Adding a wildcard symbol may retrieve word variants: theo ((chieu sach) or (chinh sach)) - hanh mang luan tong cong trinh phuong cham*.