Perhaps you should try some spelling variations:
nhung tuong » nhung huong, nhung phuong, hung vuong
hanh luan » khanh luan, hang luan, hanh luat
dung cong » dung trong
theo chu » theo chieu, cho chu, chao chu
chu xanh » chu manh, chieu xanh, chua xang
than cau » toan cau, than cap, thanh chau
phan cau » phan dau, phan cac, phan tu

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