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
hang nong » thang long, han tong
tang nong » tang dong, tang mong, tang cuong
thanh cac » hanh cac, thanh bac, thanh ca
than cap » khan cap, thanh lap, than cua

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