Perhaps you should try some spelling variations:
nhung cong » dung cong, thong cong, hang cong
tang luan » dung luan
tri tinh » tri kinh, trieu tinh, thai tinh
tang cua » mang cua, hang cua, thong cua
cong san » cong tac
toan cau » toan cao, toan tap, toan tai
toan ban » van ban

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

• Performing a fuzzy search may retrieve terms with similar spellings: mot tri tinh - hanh ((tang cua) or (tang luan)) nhung cong san ((toan cau) or (toan ban))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: mot tri tinh - hanh ((tang cua) OR (tang luan)) nhung cong san ((toan cau) OR (toan ban)).
• Adding a wildcard symbol may retrieve word variants: mot tri tinh - hanh ((tang cua) or (tang luan)) nhung cong san ((toan cau) or (toan ban))*.