Perhaps you should try some spelling variations:
nhung phuong » dung phuong, nhu phuong, truong phuong
phuong dan » phuong danh, phuong doan, huong dan
hieu sach » chieu sach, hieu cach, dien sach
hanh hang » thanh hang, hang hang, hanh han
doc hieu » toc thieu, hoc thieu, hoc hien
toan ban » van ban
toan cao » 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: doc hieu sach - hanh hang va nhung phuong dan ((toan ban) or (toan cao))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doc hieu sach - hanh hang va nhung phuong dan ((toan ban) OR (toan cao))*.