Perhaps you should try some spelling variations:
thieu xanh » chieu xanh, hieu manh, thien anh
canh trinh » canh tranh, hanh trinh, canh tinh
hoc thieu » toc thieu, hoc hien
trinh hoa » trinh do, trinh han
hoa thang » hoa thanh, hoa than, hoa thong
nong dan » nong san, nguong dan, huong dan
cong dan » cong san, cong tan, huong dan
than cap » thanh lap, thanh cac, than cua
khan cap » khan ap, khoan cam, phan cac

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 - canh trinh hoa thang ((nong dan) or (cong dan)) ((than cap) OR (khan cap))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thieu xanh - canh trinh hoa thang ((nong dan) OR (cong dan)) ((than cap) OR (khan cap)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc thieu xanh - canh trinh hoa thang ((nong dan) or (cong dan)) ((than cap) OR (khan cap))".
• Adding a wildcard symbol may retrieve word variants: hoc thieu xanh - canh trinh hoa thang ((nong dan) or (cong dan)) ((than cap) OR (khan cap))*.