Perhaps you should try some spelling variations:
thieu xanh » chieu xanh, hieu manh, thien anh
hoc thieu » toc thieu, hoc hien
tranh cua » doanh cua, manh cua
thanh bac » nhanh bac, thanh bai, thanh hai
cua hang » cua dang, cua nhung, cua cong
nong ban » nong dan, nong san, dong ban
cong san » cong tac

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

• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thieu xanh - canh tranh cua hang ((nong ban) OR (cong san)) ((thanh bac) OR (thanh san))~.
• Adding a wildcard symbol may retrieve word variants: hoc thieu xanh - canh tranh cua hang ((nong ban) or (cong san)) ((thanh bac) or (thanh san))*.