Perhaps you should try some spelling variations:
canh trinh » canh tranh, hanh trinh, canh tinh
quang dung » quang trung, cuong dung
hieu xanh » chieu xanh, hieu manh, hieu nganh
cong luan » tong luan, cong tuan, dong luan
luan phan » luan van, luan hoan
doc hieu » toc thieu, hoc thieu, hoc hien
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 - canh trinh ((quang dung) or (ung dung)) cong luan phan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doc hieu xanh - canh trinh ((quang dung) OR (ung dung)) cong luan phan cau.
• Adding a wildcard symbol may retrieve word variants: doc hieu xanh - canh trinh ((quang dung) or (ung dung)) cong luan phan cau*.