Perhaps you should try some spelling variations:
quan nhung » qua nhung, cua nhung, luan chung
hanh dong » anh dong, ha dong
dong quan » duong quan, dong quang, dung quan
ho chieu » theo chieu, hoc thieu, doi chieu
cong dan » cong tan, huong dan, cong dong
cong san » cong tac
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: ((ho chieu) or (hoc hien)) sach - hanh dong quan nhung ((cong dan) or (cong san)) toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((ho chieu) OR (hoc hien)) sach - hanh dong quan nhung ((cong dan) OR (cong san)) toan cau.
• Adding a wildcard symbol may retrieve word variants: ((ho chieu) or (hoc hien)) sach - hanh dong quan nhung ((cong dan) or (cong san)) toan cau*.