Perhaps you should try some spelling variations:
chiet tach » chieu sach
hanh trang » thanh trung, canh tranh, hanh trinh
thong cong » trong cong, tong cong, thong thong
tran hoang » tran hong, quan hoang, tran quang
hoc chiet » hoc thiet, hoc nhiet, hoc hien
trang cua » tranh cua, tang cua, trung cua
cua thong » cua thuong, cua khong, cua tong
cong san » cong tac
tuan ban » tuan bang, toan ban, luan ban

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc chiet tach - hanh trang cua thong cong san ((tuan ban) or (tran hoang))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc chiet tach - hanh trang cua thong cong san ((tuan ban) OR (tran hoang)).
• Adding a wildcard symbol may retrieve word variants: hoc chiet tach - hanh trang cua thong cong san ((tuan ban) or (tran hoang))*.