Perhaps you should try some spelling variations:
phuong danh » phuong anh, phuong dinh, phuong hanh
phuong dan » phuong doan, huong dan, phuong lan
doi chieu » doc hieu, doi chi, mot chieu
luan hung » luan chung, lan hung, luan ung
ho chieu » theo chieu, hoc thieu, mot chieu
canh bai » anh bai, thanh bai, can ban
bai luan » bai toan, li luan, vay luan
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: ((ho chieu) OR (doi chieu)) sach - canh bai luan hung ((phuong dan) or (phuong danh)) toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((ho chieu) OR (doi chieu)) sach - canh bai luan hung ((phuong dan) OR (phuong danh)) toan cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((ho chieu) OR (doi chieu)) sach - canh bai luan hung ((phuong dan) or (phuong danh)) toan cau".
• Adding a wildcard symbol may retrieve word variants: ((ho chieu) OR (doi chieu)) sach - canh bai luan hung ((phuong dan) or (phuong danh)) toan cau*.