Perhaps you should try some spelling variations:
hanh trang » thanh trung, canh tranh, hanh trinh
chieu tach » chiet tach, chieu sach, chiu trach
cong thanh » dong thanh, cong trinh, cong tan
doi chieu » doc hieu, doi chi, ho chieu
hanh tang » anh tang, hanh mang, hanh tung
dung cong » dung trong
toan cao » toan tap
toan ban » van ban
va dung » van dung, va duong, vat dung

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 tach - ((hanh tang) or (hanh trang)) va dung cong thanh ((toan cao) or (toan ban))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi chieu tach - ((hanh tang) OR (hanh trang)) va dung cong thanh ((toan cao) OR (toan ban)).
• Adding a wildcard symbol may retrieve word variants: doi chieu tach - ((hanh tang) or (hanh trang)) va dung cong thanh ((toan cao) or (toan ban))*.