Perhaps you should try some spelling variations:
cua phuong » cuu phuong, cuc phuong, luan phuong
hien sach » dien sach, kien sach, thien hach
ca thuong » cao thuong, cua thuong, va thuong
canh van » anh van, can van, cach van
cong dan » cong san, cong tan, huong dan
dan than » dan chan, ban than, van than
than cau » toan cau, phan cau, than cap

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc hien sach - canh van ((ca thuong) or (cua phuong)) cong dan than cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc hien sach - canh van ((ca thuong) OR (cua phuong)) cong dan than cau*.