Perhaps you should try some spelling variations:
thanh thuong » thanh huong, thanh chuong, khanh thuong
thanh phuong » thanh huong, thanh chuong, khanh phong
hoc thieu » toc thieu, hoc hien
dung cong » dung trong
cong nong » cong dong, cong cong, cong trong
nong phan » nang phan, cong phan, dong phan
doc hieu » toc thieu, hoc hien
va dung » van dung, va duong, vat dung

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((doc hieu) or (hoc thieu)) xanh - ((thanh thuong) or (thanh phuong)) va dung cong nong phan tu~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((doc hieu) OR (hoc thieu)) xanh - ((thanh thuong) OR (thanh phuong)) va dung cong nong phan tu*.