Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
chieu tinh » trieu tinh, lieu tinh, chau tinh
thong cong » trong cong, tong cong, thong thong
hanh tang » hanh trang, anh tang, hanh mang
va thong » va thuong, va phuong, he thong
tan toan » tap toan, van toan, dan toan
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)) - hanh tang va thong cong ((tan toan) or (tan tran)) cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo ((chieu sach) OR (chieu tinh)) - hanh tang va thong cong ((tan toan) OR (tan tran)) cao.
• Adding a wildcard symbol may retrieve word variants: theo ((chieu sach) or (chieu tinh)) - hanh tang va thong cong ((tan toan) or (tan tran)) cao*.