Perhaps you should try some spelling variations:
hanh trinh » canh tranh, hanh chinh
hieu lang » chieu sang, hieu quang, nhieu tang
trinh van » trinh han, trinh quan, trinh toan
bang cong » dang cong, bang song, hang cong
van bang » van ban, van nang, von bang
dan toan » dan than, manh toan, xuan toan
van toan » van tuan, van tan, van thanh
ho hieu » ho chieu, hoi hieu, nho hieu

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 - hanh trinh van bang cong ((dan toan) or (van toan)) cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho hieu lang - hanh trinh van bang cong ((dan toan) OR (van toan)) cau.
• Adding a wildcard symbol may retrieve word variants: ho hieu lang - hanh trinh van bang cong ((dan toan) or (van toan)) cau*.