Perhaps you should try some spelling variations:
chieu sach » chinh sach, chieu sang, chieu xanh
nhung cong » dung cong, thong cong, hang cong
tranh cua » doanh cua, manh cua
cua nhung » va nhung
cong tinh » cong trinh, cong vinh, long tinh
toan cao » toan tap
toan ban » van ban

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

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