Perhaps you should try some spelling variations:
nhung phuong » nhu phuong, truong phuong, bang phuong
dung phuong » dung thuong, bang phuong, dung chung
doi chieu » doc hieu, ho chieu, mot chieu
canh vay » canh tay, canh va, canh van
vay luan » ly luan, von luan, bai luan
van tuan » van quan, van ban, anh tuan
tuan cao » toan cao, juan cao, quang cao
doi chi » doi khi

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