Perhaps you should try some spelling variations:
nang phuong » bang phuong, nang thuong, nano phuong
phuong danh » phuong anh, phuong dinh, phuong hanh
doi chieu » doc hieu, ho chieu, mot chieu
danh than » danh thanh, danh thang, danh nhan
trang va » hang va
tran van » luan van
than tap » toan tap, han tap, phan tap
doi chi » doi khi

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: ((doi chieu) OR (doi chi)) sach - hanh ((trang va) OR (tran van)) nang phuong danh than tap~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((doi chieu) or (doi chi)) sach - hanh ((trang va) OR (tran van)) nang phuong danh than tap~".
• Adding a wildcard symbol may retrieve word variants: ((doi chieu) or (doi chi)) sach - hanh ((trang va) OR (tran van)) nang phuong danh than tap*.