Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
doi chieu » doc hieu, doi chi, mot chieu
cong phan » cong nhan, cong khan, chong phap
dung cong » dung trong
dung dat » dung va, dung tai
van dan » van ban, ban dan, van dao
dan thi » dang thi, tran thi, dinh thi

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

• Performing a fuzzy search may retrieve terms with similar spellings: doi chieu sach - thanh cong phan ((dung dat) OR (dung cong)) van dan thi~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doi chieu sach - thanh cong phan ((dung dat) OR (dung cong)) van dan thi*".