Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
hanh trang » thanh trung, canh tranh, hanh trinh
doi chieu » doc hieu, doi chi, ho chieu
luong tai » dung tai, luong va
trang va » tran van, hang va
cong tac » cong ty
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: doi chieu sach - hanh trang va nhung ((luong tai) or (cong tac)) toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi chieu sach - hanh trang va nhung ((luong tai) OR (cong tac)) toan cau.
• Adding a wildcard symbol may retrieve word variants: doi chieu sach - hanh trang va nhung ((luong tai) or (cong tac)) toan cau*.