Perhaps you should try some spelling variations:
ngang thanh » nang thanh, nganh thanh, ngan thanh
hang doanh » hanh doanh, nhung doanh, van doanh
cong ngang » cong nhan, cong quang, cong lang
hoc thieu » hoc hien
doanh cua » doanh luan
dung cong » dung trong
cua dung » cua dang, cua dong, qua dung

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((hoc thieu) or (toc thieu)) tinh - hang doanh cua dung cong ngang thanh san~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((hoc thieu) OR (toc thieu)) tinh - hang doanh cua dung cong ngang thanh san*.