Perhaps you should try some spelling variations:
chiet tach » chieu sach
nhieu tang » chieu sang, hieu lang, nhiet nang
hanh trang » thanh trung, canh tranh, hanh trinh
trang cua » tranh cua, tang cua, trung cua
dang cong » dung cong
cua dang » cua cong, cua ban
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: ho ((((nhieu tang) or (hieu qua))) or (chiet tach)) - hanh trang cua dang cong san toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho ((((nhieu tang) OR (hieu qua))) OR (chiet tach)) - hanh trang cua dang cong san toan cau.
• Adding a wildcard symbol may retrieve word variants: ho ((((nhieu tang) or (hieu qua))) or (chiet tach)) - hanh trang cua dang cong san toan cau*.