Perhaps you should try some spelling variations:
thanh tran » thanh trang, thanh toan, thanh tra
phong cong » phong chong, thong cong, chong cong
hien sach » dien sach, thien hach, chieu sach
kien sach » dien sach, vien bach, kien mac
van phong » van dong, hai phong
tran van » luan van
cong dan » cong san, cong tan, huong dan
dan chan » dan gian, dan ca, van chat
chan cau » phan cau, can cau, chinh cau

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) or (kien sach)) - thanh tran van phong cong dan chan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((hien sach) OR (kien sach)) - thanh tran van phong cong dan chan cau*.