Perhaps you should try some spelling variations:
nhung cong » dung cong, thong cong, hang cong
tang luan » dung luan
tang cua » mang cua, hang cua, thong cua
cong san » cong tac
san than » sang than, san thanh, ban than
than cau » toan cau, phan cau, than cap
chu van » cuu van

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

• Performing a fuzzy search may retrieve terms with similar spellings: cua ((chu han) OR (chu van)) - hanh ((tang cua) or (tang luan)) nhung cong san than cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: cua ((chu han) OR (chu van)) - hanh ((tang cua) OR (tang luan)) nhung cong san than cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "cua ((chu han) OR (chu van)) - hanh ((tang cua) or (tang luan)) nhung cong san than cau".
• Adding a wildcard symbol may retrieve word variants: cua ((chu han) OR (chu van)) - hanh ((tang cua) or (tang luan)) nhung cong san than cau*.