Perhaps you should try some spelling variations:
chiet tach » chieu sach
cong thanh » dong thanh, cong trinh, cong tan
cua nhung » va nhung
cong manh » cong danh, duong manh, hoang manh
ho chiet » ho chieu, ho thiet, hoc thiet
anh dung » anh huong, sach dung, ung dung
anh dong » anh huong, anh son
toan cao » toan ban, toan tap

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 chiet tach - ((anh dung) OR (anh dong)) cua nhung ((cong manh) OR (cong thanh)) toan cao~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho chiet tach - ((anh dung) OR (anh dong)) cua nhung ((cong manh) or (cong thanh)) toan cao~".
• Adding a wildcard symbol may retrieve word variants: ho chiet tach - ((anh dung) OR (anh dong)) cua nhung ((cong manh) or (cong thanh)) toan cao*.