Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
hanh trang » thanh trung, canh tranh, hanh trinh
thong cong » trong cong, tong cong, thong thong
hien xanh » hien hanh, hien nhanh, chieu xanh
trang cua » tranh cua, tang cua, trung cua
cua thong » cua thuong, cua khong, cua tong
tran manh » tran minh, tran thanh, tran van
cong dan » cong san, cong tan, huong dan
dan tran » dang tran, tan tran, dan than

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc ((hien xanh) or (chieu sach)) - hanh trang cua thong cong dan tran manh~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((hien xanh) OR (chieu sach)) - hanh trang cua thong cong dan tran manh.
• Adding a wildcard symbol may retrieve word variants: hoc ((hien xanh) or (chieu sach)) - hanh trang cua thong cong dan tran manh*.