Perhaps you should try some spelling variations:
thanh thuong » thanh huong, thanh chuong, thanh phuong
hoc thieu » toc thieu
thuong va » truong va, thong va, thuong mai
dung cong » dung trong
cong nong » cong dong, cong cong, cong trong
nong phan » nang phan, cong phan, dong phan
doc hieu » toc thieu
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) OR (hoc hien)))) xanh - thanh thuong va dung cong nong phan tu~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((doc hieu) OR (((hoc thieu) OR (hoc hien)))) xanh - thanh thuong va dung cong nong phan tu*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((doc hieu) or (((hoc thieu) OR (hoc hien)))) xanh - thanh thuong va dung cong nong phan tu*".