Perhaps you should try some spelling variations:
trang trinh » tra trinh, trang tri, thanh trinh
hanh trang » thanh trung, canh tranh, hanh trinh
mot chieu » doi chieu, ho chieu
dung cong » dung trong
doc hieu » toc thieu, hoc thieu, hoc hien
cong san » cong tac
toan ban » van ban
toan cao » 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: ((mot chieu) or (doc hieu)) sang - hanh trang trinh dung cong san ((toan ban) or (toan cao))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((mot chieu) OR (doc hieu)) sang - hanh trang trinh dung cong san ((toan ban) OR (toan cao)).
• Adding a wildcard symbol may retrieve word variants: ((mot chieu) or (doc hieu)) sang - hanh trang trinh dung cong san ((toan ban) or (toan cao))*.