Perhaps you should try some spelling variations:
chiet tach » chieu sach
nhung cong » dung cong, thong cong, hang cong
doi chiet » doi chieu, doi chi, doi viet
hanh tang » hanh trang, anh tang, hanh mang
cong san » cong tac
san toan » van toan, dan toan, manh toan
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 chiet tach - ((hanh tang) or (canh tranh)) va nhung cong san toan cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi chiet tach - ((hanh tang) OR (canh tranh)) va nhung cong san toan cao.
• Adding a wildcard symbol may retrieve word variants: doi chiet tach - ((hanh tang) or (canh tranh)) va nhung cong san toan cao*.