Perhaps you should try some spelling variations:
canh trinh » canh tranh, hanh trinh, canh tinh
cuong dung » tuong duong, thong dung
hoc thieu » toc thieu, hoc hien
cong luan » tong luan, cong tuan, dong luan
luan phan » luan van, luan hoan
ho chieu » theo chieu, doi chieu, mot chieu
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: ((ho chieu) OR (hoc thieu)) tinh - canh trinh ((cuong dung) or (ung dung)) cong luan phan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((ho chieu) OR (hoc thieu)) tinh - canh trinh ((cuong dung) OR (ung dung)) cong luan phan cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((ho chieu) OR (hoc thieu)) tinh - canh trinh ((cuong dung) or (ung dung)) cong luan phan cau".
• Adding a wildcard symbol may retrieve word variants: ((ho chieu) OR (hoc thieu)) tinh - canh trinh ((cuong dung) or (ung dung)) cong luan phan cau*.