Perhaps you should try some spelling variations:
nhung cong » dung cong, thong cong, hang cong
tieu sang » chieu sang, tieu dung, tiem nang
tranh cua » doanh cua, manh cua
tang luan » dung luan
cong san » cong tac
toan cau » toan ban, toan tap, toan tai
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: theo tieu sang - hanh ((tranh cua) or (tang luan)) nhung cong san ((toan cau) OR (toan cao))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo tieu sang - hanh ((tranh cua) OR (tang luan)) nhung cong san ((toan cau) OR (toan cao)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo tieu sang - hanh ((tranh cua) or (tang luan)) nhung cong san ((toan cau) OR (toan cao))".
• Adding a wildcard symbol may retrieve word variants: theo tieu sang - hanh ((tranh cua) or (tang luan)) nhung cong san ((toan cau) OR (toan cao))*.