Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
doi chieu » doc hieu, doi chi, ho chieu
thong ban » thong van, trong ban, thong bai
ban thanh » ban hanh, ban hang
thanh cau » thanh chau, thanh mau, nhanh cau
trang va » hang va
tran 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: doi chieu sach - hanh ((trang va) or (tran van)) thong thong ban thanh cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi chieu sach - hanh ((trang va) OR (tran van)) thong thong ban thanh cau.
• Adding a wildcard symbol may retrieve word variants: doi chieu sach - hanh ((trang va) or (tran van)) thong thong ban thanh cau*.