Perhaps you should try some spelling variations:
luan nhung » luan chung, luan hung, quan nhung
hanh dong » anh dong, ha dong
dong luan » dung luan, tong luan, dong xuan
chu xanh » chu manh, chieu xanh, chua xang
cong dan » cong tan, huong dan, cong dong
cong san » cong tac
toan cau » toan cao, toan ban, toan tap
chu van » cuu van, chu han

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: theo ((chu xanh) OR (chu van)) - hanh dong luan nhung ((cong dan) OR (cong san)) toan cau~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo ((chu xanh) or (chu van)) - hanh dong luan nhung ((cong dan) OR (cong san)) toan cau~".
• Adding a wildcard symbol may retrieve word variants: theo ((chu xanh) or (chu van)) - hanh dong luan nhung ((cong dan) OR (cong san)) toan cau*.