Perhaps you should try some spelling variations:
chiet tach » chieu sach
hanh trinh » canh tranh, hanh chinh
thong cong » trong cong, tong cong, thong thong
trinh cua » tinh cua, trinh luat, trinh quan
cua thong » cua thuong, cua khong, cua tong
thanh ban » thanh san, thanh van, thanh bac
cong san » cong tac
than ban » toan ban, than man, nhuan ban

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: hoc ((nhiet tach) OR (chiet tach)) - hanh trinh cua thong cong san ((than ban) OR (thanh ban))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((nhiet tach) OR (chiet tach)) - hanh trinh cua thong cong san ((than ban) or (thanh ban))~".
• Adding a wildcard symbol may retrieve word variants: hoc ((nhiet tach) OR (chiet tach)) - hanh trinh cua thong cong san ((than ban) or (thanh ban))*.