Perhaps you should try some spelling variations:
nhung cong » dung cong, thong cong, hang cong
doi chieu » doc hieu, doi chi, mot chieu
chinh cua » chinh sua, hinh cua, chinh luan
cong luan » tong luan, cong tuan, dong luan
ho chieu » theo chieu, hoc thieu, mot chieu
chinh ca » chinh ta, chinh va, chinh tai

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