Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
chieu tinh » lieu tinh, chau tinh, kieu tinh
nhung cong » dung cong, thong cong, hang cong
hanh tang » hanh trang, anh tang, hanh mang
cong san » cong tac
pham cau » phan cau, pham ca, pham can
tang va » trang va, tang van, thang va

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 (((chieu tinh) OR (trieu tinh)))) - hanh tang va nhung cong san pham cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo ((chieu sach) OR (((chieu tinh) OR (trieu tinh)))) - hanh tang va nhung cong san pham cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo ((chieu sach) or (((chieu tinh) OR (trieu tinh)))) - hanh tang va nhung cong san pham cau".
• Adding a wildcard symbol may retrieve word variants: theo ((chieu sach) or (((chieu tinh) OR (trieu tinh)))) - hanh tang va nhung cong san pham cau*.