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