Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
dong cong » duong cong, dung cong, dang cong
chu manh » ho manh, chu han, chu van
tang cua » mang cua, tang luan, thong cua
hang cua » mang cua, hang ca, huong cua
cong dan » cong san, cong tan, huong dan
dan toan » van toan, dan than, manh toan
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 (chu manh)) - hanh ((tang cua) OR (hang cua)) dong cong dan toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo ((chieu sach) OR (chu manh)) - hanh ((tang cua) OR (hang cua)) dong cong dan toan cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo ((chieu sach) or (chu manh)) - hanh ((tang cua) OR (hang cua)) dong cong dan toan cau".
• Adding a wildcard symbol may retrieve word variants: theo ((chieu sach) or (chu manh)) - hanh ((tang cua) OR (hang cua)) dong cong dan toan cau*.