Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
nhung cong » dung cong, thong cong, hang cong
lieu tinh » trieu tinh, diep tinh, bien tinh
tranh cua » doanh cua, manh cua
cua nhung » va nhung
dang cac » bang cac, dong cac, hang cac
dung cac » luong cac, dung cho, dung tai

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

• If you are trying to use Boolean operators, they must be ALL CAPS: ho ((lieu tinh) OR (chieu sach)) - canh tranh cua nhung cong ((dang cac) OR (dung cac)) thu~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho ((lieu tinh) or (chieu sach)) - canh tranh cua nhung cong ((dang cac) OR (dung cac)) thu~".
• Adding a wildcard symbol may retrieve word variants: ho ((lieu tinh) or (chieu sach)) - canh tranh cua nhung cong ((dang cac) OR (dung cac)) thu*.