Perhaps you should try some spelling variations:
nhung cong » dung cong, thong cong, hang cong
cong quang » luong quang, thong quang, duong quang
quang toan » quang tuan, quang tran, quang doan
doi chieu » doc hieu, doi chi, mot chieu
trinh cua » tinh cua, trinh quan, trinh luan
ho chieu » theo chieu, hoc thieu, mot chieu
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 ((trinh cua) OR (trinh luat)) nhung cong quang toan cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((ho chieu) OR (doi chieu)) xanh - hanh ((trinh cua) OR (trinh luat)) nhung cong quang toan cao.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((ho chieu) or (doi chieu)) xanh - hanh ((trinh cua) OR (trinh luat)) nhung cong quang toan cao".
• Adding a wildcard symbol may retrieve word variants: ((ho chieu) or (doi chieu)) xanh - hanh ((trinh cua) OR (trinh luat)) nhung cong quang toan cao*.