Perhaps you should try some spelling variations:
hanh trinh » canh tranh, hanh chinh
chiet tach » chieu sach
hieu tach » hieu cach, chieu sach, lieu thach
luat hang » luat hanh, luat chung, luat quang
cong danh » cuong danh, cong dan, cong thanh
cong anh » dong anh, hong anh, cong thanh
tuan cau » toan cau, quan cau, tuan cu

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: doc ((hieu tach) OR (chiet tach)) - hanh trinh luat hang ((cong anh) OR (cong danh)) tuan cau~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doc ((hieu tach) OR (chiet tach)) - hanh trinh luat hang ((cong anh) or (cong danh)) tuan cau~".
• Adding a wildcard symbol may retrieve word variants: doc ((hieu tach) OR (chiet tach)) - hanh trinh luat hang ((cong anh) or (cong danh)) tuan cau*.