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 » trong ban, thong bai, thong dan
thong van » trong van, thong va, thong quan
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) OR (thong van)) 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) OR (thong van)) thanh cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doi chieu sach - hanh ((trang va) or (tran van)) thong ((thong ban) OR (thong van)) thanh cau".
• Adding a wildcard symbol may retrieve word variants: doi chieu sach - hanh ((trang va) or (tran van)) thong ((thong ban) OR (thong van)) thanh cau*.