Perhaps you should try some spelling variations:
thieu xanh » chieu xanh, hieu manh, thien anh
thien danh » thien anh, thien dang, thien thanh
hanh tranh » canh tranh, hanh trinh, hanh trang
nong thong » nong thon, dong thong, cong thong
tranh cua » doanh cua, manh cua
thong van » trong van, thong va, thong quan
cua nong » cua cong, cuu nong, cua dong
van ca » van cau, van cua, dan ca

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 xanh) or (thien danh)) - hanh tranh cua nong thong thong van ca~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((thieu xanh) OR (thien danh)) - hanh tranh cua nong thong thong van ca*.