Perhaps you should try some spelling variations:
hanh trinh » canh tranh, hanh chinh
quan hang » quan hoang, quan lang, qua hang
quan hanh » quan thanh, quang thanh, quang khanh
yen tinh » tuyen tinh
cong dan » cong san, cong tan, huong dan
dan phan » doan phan, dan chan, van phan
ho yen » o yen, chao yen, hong yen

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

• Performing a fuzzy search may retrieve terms with similar spellings: ho yen tinh - hanh trinh ((quan hang) or (quan hanh)) cong dan phan tu~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho yen tinh - hanh trinh ((quan hang) OR (quan hanh)) cong dan phan tu.
• Adding a wildcard symbol may retrieve word variants: ho yen tinh - hanh trinh ((quan hang) or (quan hanh)) cong dan phan tu*.