Perhaps you should try some spelling variations:
nhung phuong » dung phuong, nhu phuong, truong phuong
chieu sach » chinh sach, chiet tach, chieu sang
phuong dan » phuong danh, phuong doan, huong dan
ho chieu » theo chieu, hoc thieu, doi chieu
trang va » hang va
tran van » luan van
toan cao » toan tap
toan ban » van ban

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

• If you are trying to use Boolean operators, they must be ALL CAPS: ho chieu sach - thanh ((trang va) OR (tran van)) nhung phuong dan ((toan cao) OR (toan ban))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho chieu sach - thanh ((trang va) OR (tran van)) nhung phuong dan ((toan cao) or (toan ban))~".
• Adding a wildcard symbol may retrieve word variants: ho chieu sach - thanh ((trang va) OR (tran van)) nhung phuong dan ((toan cao) or (toan ban))*.