Perhaps you should try some spelling variations:
thap chieu » phap hieu, thau hieu, tam chieu
chieu sach » chinh sach, chiet tach, chieu sang
cong thanh » dong thanh, cong trinh, cong tan
thuong co » thuong con, thong co, thuong ho
dan phan » doan phan, dan chan, van phan
co dan » co ban, ca dan, cao dang

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

• Performing a fuzzy search may retrieve terms with similar spellings: thap chieu sach - thanh ((dung luan) or (cong thanh)) thuong co dan phan tu~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thap chieu sach - thanh ((dung luan) OR (cong thanh)) thuong co dan phan tu*.