Perhaps you should try some spelling variations:
luan trong » quan trong, luat trong, luan tuong
hanh tang » hanh trang, anh tang, hanh mang
tang luan » dung luan
chu manh » ho manh, chu van, thu minh
cong san » cong tac
than cau » phan cau, than cap, thanh chau
toan cau » toan cao, toan ban, toan tap
chu han » chu van

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: cho ((chu manh) OR (chu han)) - hanh tang luan trong cong san ((than cau) OR (toan cau))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "cho ((chu manh) OR (chu han)) - hanh tang luan trong cong san ((than cau) or (toan cau))~".
• Adding a wildcard symbol may retrieve word variants: cho ((chu manh) OR (chu han)) - hanh tang luan trong cong san ((than cau) or (toan cau))*.