Perhaps you should try some spelling variations:
hanh trang » thanh trung, canh tranh, hanh trinh
chiet tach » chieu sach
nhung cong » dung cong, thong cong, hang cong
hieu lang » chieu sang, hieu quang, nhieu tang
van thanh » ban thanh, van tuan
trang va » tran van, hang va
tan toan » tan tran, tap toan, van toan

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: ho ((hieu lang) or (chiet tach)) - hanh trang va nhung cong ((tan toan) or (van thanh)) cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho ((hieu lang) OR (chiet tach)) - hanh trang va nhung cong ((tan toan) OR (van thanh)) cao.
• Adding a wildcard symbol may retrieve word variants: ho ((hieu lang) or (chiet tach)) - hanh trang va nhung cong ((tan toan) or (van thanh)) cao*.