Perhaps you should try some spelling variations:
thieu xanh » chieu xanh, hieu manh, thien anh
canh trinh » canh tranh, canh tinh, anh trinh
hanh trinh » canh tranh, hanh chinh
nhung cong » thong cong, hang cong, nhung don
hoc thieu » toc thieu, hoc hien
dung cong » dung trong
doan phan » doanh phan, toan phan, dan phan
phan cau » phan dau, phan cac, phan tu

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