Perhaps you should try some spelling variations:
thong cong » trong cong, tong cong, thong thong
hanh trang » thanh trung, canh tranh, hanh trinh
hoi hieu » hoi phieu, hoi tieu, moi hieu
cong dan » cong san, cong tan, huong dan
ho hieu » ho chieu, nho hieu, co hieu
dan cua » dan ca, ban cua, dai cua
cua cau » cua cac, cua chu, cua cay

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

• If you are trying to use Boolean operators, they must be ALL CAPS: ((ho hieu) OR (hoi hieu)) lang - ((hanh trang) OR (hanh chinh)) he thong cong dan cua cau~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((ho hieu) OR (hoi hieu)) lang - ((hanh trang) or (hanh chinh)) he thong cong dan cua cau~".
• Adding a wildcard symbol may retrieve word variants: ((ho hieu) OR (hoi hieu)) lang - ((hanh trang) or (hanh chinh)) he thong cong dan cua cau*.