Perhaps you should try some spelling variations:
nhung cong » dung cong, thong cong, hang cong
chieu sach » chinh sach, chiet tach, chieu sang
theo sach » thuoc sach, te sach, theo lich
tranh cua » doanh cua, manh cua
cua nhung » va nhung
manh toan » thanh toan, anh tuan, tinh toan
san toan » van toan, dan toan, xuan toan

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: toc ((theo sach) or (chieu sach)) - canh tranh cua nhung cong ((san toan) OR (manh toan)) cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc ((theo sach) OR (chieu sach)) - canh tranh cua nhung cong ((san toan) OR (manh toan)) cao.
• The words AND, OR and NOT may confuse the search; try adding quotes: "toc ((theo sach) or (chieu sach)) - canh tranh cua nhung cong ((san toan) OR (manh toan)) cao".
• Adding a wildcard symbol may retrieve word variants: toc ((theo sach) or (chieu sach)) - canh tranh cua nhung cong ((san toan) OR (manh toan)) cao*.