Perhaps you should try some spelling variations:
thinh khong » tinh khong, trinh khong, thi khong
dien sach » dien anh
doc dien » duoc dien, doi dien, do dien
gian dan » gian lang
dan cong » dang cong, van cong, dan dong
cong dan » cong san, cong tan, huong dan
phan lap » phan dau
phan van » pham van, thanh van, luan van

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

• Performing a fuzzy search may retrieve terms with similar spellings: doc dien sach - thinh khong gian dan cong dan ((phan lap) OR (phan van))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doc dien sach - thinh khong gian dan cong dan ((phan lap) OR (phan van))*".