Perhaps you should try some spelling variations:
thanh trung » thanh tung
hanh trinh » canh tranh, hanh chinh
thong cong » trong cong, tong cong, thong thong
hoc chieu » hoc thieu, ho chieu, hoc dieu
van thong » van thuong, van phong, va thong
san thanh » ban thanh, van thanh, son thanh
thanh lap » thanh san, phan lap, thanh hai
cong san » cong tac

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((hoc chieu) OR (hoc hien)) sach - ((thanh trung) or (hanh trinh)) van thong cong san thanh lap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((hoc chieu) OR (hoc hien)) sach - ((thanh trung) OR (hanh trinh)) van thong cong san thanh lap.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((hoc chieu) OR (hoc hien)) sach - ((thanh trung) or (hanh trinh)) van thong cong san thanh lap".
• Adding a wildcard symbol may retrieve word variants: ((hoc chieu) OR (hoc hien)) sach - ((thanh trung) or (hanh trinh)) van thong cong san thanh lap*.