Perhaps you should try some spelling variations:
chieu sach » chinh sach, chieu sang, chieu xanh
thien hach » thien thanh, hien hanh
nhung cong » dung cong, thong cong, hang cong
cua nhung » va nhung
cong cua » cong cu, dong cua, huong cua
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: hoc ((((chieu sach) or (chiet tach))) or (thien hach)) - thanh cong cua nhung cong san toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((((chieu sach) OR (chiet tach))) OR (thien hach)) - thanh cong cua nhung cong san toan cau.
• Adding a wildcard symbol may retrieve word variants: hoc ((((chieu sach) or (chiet tach))) or (thien hach)) - thanh cong cua nhung cong san toan cau*.