Perhaps you should try some spelling variations:
hieu quang » thieu quang, hieu quan, hieu qua
thien quan » trien quang, lien quan, thien van
tranh luan » trinh luan, trinh luat, doanh luan
luan phan » luan van, luan hoan
phan cong » thanh cong
cong tan » cong tac, cong san, cong thanh
tran cau » tran chau, toan cau, ran cau

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

• Performing a fuzzy search may retrieve terms with similar spellings: ho ((hieu quang) or (thien quan)) - canh tranh luan phan cong tan tran cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho ((hieu quang) OR (thien quan)) - canh tranh luan phan cong tan tran cau.
• Adding a wildcard symbol may retrieve word variants: ho ((hieu quang) or (thien quan)) - canh tranh luan phan cong tan tran cau*.