Perhaps you should try some spelling variations:
canh trinh » canh tranh, hanh trinh, canh tinh
chieu xanh » chieu sach, chieu sang, chieu tinh
quan duong » tuan duong, quan dong, qua duong
hieu xanh » hieu manh, hieu nganh, dieu hanh
quan dung » quang dung, qua dung, quan dong
cong luan » tong luan, cong tuan, dong luan
luan phan » luan van, luan hoan
phan cau » phan dau, phan cac, phan tu

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

• Performing a fuzzy search may retrieve terms with similar spellings: doc ((hieu xanh) OR (chieu xanh)) - canh trinh ((quan dung) or (quan duong)) cong luan phan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doc ((hieu xanh) OR (chieu xanh)) - canh trinh ((quan dung) OR (quan duong)) cong luan phan cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doc ((hieu xanh) OR (chieu xanh)) - canh trinh ((quan dung) or (quan duong)) cong luan phan cau".
• Adding a wildcard symbol may retrieve word variants: doc ((hieu xanh) OR (chieu xanh)) - canh trinh ((quan dung) or (quan duong)) cong luan phan cau*.