Perhaps you should try some spelling variations:
phung cong » nhung cong, phong cong, nhung chong
doi chieu » doc hieu, doi chi, mot chieu
hanh luan » khanh luan, hang luan, hanh luat
hung cong » nhung cong, hung cuong, dung cong
ho chieu » theo chieu, hoc thieu, mot chieu
van toan » van tuan, van tan, van thanh
toan cau » toan cao, toan ban, toan tap

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 (doi chieu)) xanh - hanh luan van ((hung cong) OR (phung cong)) van toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((ho chieu) OR (doi chieu)) xanh - hanh luan van ((hung cong) OR (phung cong)) van toan cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((ho chieu) or (doi chieu)) xanh - hanh luan van ((hung cong) OR (phung cong)) van toan cau".
• Adding a wildcard symbol may retrieve word variants: ((ho chieu) or (doi chieu)) xanh - hanh luan van ((hung cong) OR (phung cong)) van toan cau*.