Perhaps you should try some spelling variations:
trung tran » trung tuan, trung thanh, hung tran
van thinh » van thanh, van chinh, van minh
tong cong » trong cong, cong cong, dung cong
van tinh » van minh, ban tinh, van dinh
cong dan » cong san, cong tan, huong dan
dan toan » van toan, dan than, manh toan
toan ban » van ban

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

• Performing a fuzzy search may retrieve terms with similar spellings: ho ((van tinh) or (van thinh)) - hanh ((trung tran) OR (trung tam)) tong cong dan toan ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho ((van tinh) OR (van thinh)) - hanh ((trung tran) OR (trung tam)) tong cong dan toan ban.
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho ((van tinh) or (van thinh)) - hanh ((trung tran) OR (trung tam)) tong cong dan toan ban".
• Adding a wildcard symbol may retrieve word variants: ho ((van tinh) or (van thinh)) - hanh ((trung tran) OR (trung tam)) tong cong dan toan ban*.