Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
chua xang » chua nang, chuc nang, chu bang
cua thong » cua thuong, cua khong, cua tong
thong dan » thong van, tuong dan, thong den
anh tang » anh bang, anh dang, anh nang
tang cua » mang cua, hang cua, tang luan
than cau » phan cau, than cap, thanh chau
toan cau » toan cao, toan ban, toan tap

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

• Performing a fuzzy search may retrieve terms with similar spellings: theo ((chieu sach) or (chua xang)) - anh tang cua thong thong dan ((than cau) OR (toan cau))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo ((chieu sach) OR (chua xang)) - anh tang cua thong thong dan ((than cau) OR (toan cau)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo ((chieu sach) or (chua xang)) - anh tang cua thong thong dan ((than cau) OR (toan cau))".
• Adding a wildcard symbol may retrieve word variants: theo ((chieu sach) or (chua xang)) - anh tang cua thong thong dan ((than cau) OR (toan cau))*.