Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
nhung cong » dung cong, thong cong, hang cong
bien tinh » bi tinh, yen tinh, diep tinh
tinh cua » trinh cua, tinh chat, tranh cua
sinh cua » manh cua, dinh cuu, sinh va
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: ho ((chieu sach) or (bien tinh)) - hanh ((tinh cua) OR (sinh cua)) nhung cong san toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho ((chieu sach) OR (bien tinh)) - hanh ((tinh cua) OR (sinh cua)) nhung cong san toan cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho ((chieu sach) or (bien tinh)) - hanh ((tinh cua) OR (sinh cua)) nhung cong san toan cau".
• Adding a wildcard symbol may retrieve word variants: ho ((chieu sach) or (bien tinh)) - hanh ((tinh cua) OR (sinh cua)) nhung cong san toan cau*.