Perhaps you should try some spelling variations:
thieu xanh » chieu xanh, hieu manh, thien anh
canh trinh » hanh trinh, canh tinh, anh trinh
nhung cong » dung cong, thong cong, hang cong
hoc thieu » toc thieu, hoc hien
cong san » cong tac
phan dau » phan tu, hang dau
phan cac » nhan cach, phan lap, phan van

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) OR (canh tranh)) va nhung cong san ((phan dau) or (phan cac))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thieu xanh - ((canh trinh) OR (canh tranh)) va nhung cong san ((phan dau) OR (phan cac)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc thieu xanh - ((canh trinh) OR (canh tranh)) va nhung cong san ((phan dau) or (phan cac))".
• Adding a wildcard symbol may retrieve word variants: hoc thieu xanh - ((canh trinh) OR (canh tranh)) va nhung cong san ((phan dau) or (phan cac))*.