Perhaps you should try some spelling variations:
khong cong » thong cong, khong cang, chong cong
phan bien » phan kien, phan tien, phan bon
hanh tang » hanh trang, anh tang, hanh mang
cua khong » hua khong, cua phuong, cua thuong
cong luan » tong luan, cong tuan, dong luan
pho bien » che bien
tang cua » mang cua, hang cua, tang luan
so bien » mot bien

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((((pho bien) or (phan bien))) or (so bien)) tinh - hanh tang cua khong cong luan van ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((((pho bien) OR (phan bien))) OR (so bien)) tinh - hanh tang cua khong cong luan van ban.
• Adding a wildcard symbol may retrieve word variants: ((((pho bien) or (phan bien))) or (so bien)) tinh - hanh tang cua khong cong luan van ban*.