Perhaps you should try some spelling variations:
thanh trung » thanh tung
phuong cong » phuong dong, phong cong, phung cong
chieu sach » chinh sach, chiet tach, chieu sang
cuu phuong » cac phuong, thu phuong
trung cuu » trung cua, trung cau, truong cua
cong luan » tong luan, cong tuan, dong luan
moi sach » hoc sach, bo sach, co sach

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

• Performing a fuzzy search may retrieve terms with similar spellings: doi ((moi sach) or (chieu sach)) - thanh trung cuu phuong cong luan van ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi ((moi sach) OR (chieu sach)) - thanh trung cuu phuong cong luan van ban.
• Adding a wildcard symbol may retrieve word variants: doi ((moi sach) or (chieu sach)) - thanh trung cuu phuong cong luan van ban*.