Perhaps you should try some spelling variations:
nhung phuong » nhu phuong, truong phuong, bang phuong
dung phuong » dung thuong, bang phuong, dung chung
chieu sach » chinh sach, chiet tach, chieu sang
doi chieu » doc hieu, doi chi, ho chieu
vay luan » von luan, bai luan
van tuan » van quan, van ban, anh tuan
tuan cao » toan cao, juan cao, quang cao

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 - canh ((vay luan) OR (ly luan)) ((nhung phuong) or (dung phuong)) van tuan cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi chieu sach - canh ((vay luan) OR (ly luan)) ((nhung phuong) OR (dung phuong)) van tuan cao.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doi chieu sach - canh ((vay luan) OR (ly luan)) ((nhung phuong) or (dung phuong)) van tuan cao".
• Adding a wildcard symbol may retrieve word variants: doi chieu sach - canh ((vay luan) OR (ly luan)) ((nhung phuong) or (dung phuong)) van tuan cao*.