Perhaps you should try some spelling variations:
tcanh tranh » thanh thanh, can tranh, lanh tranh
thieu xanh » chieu xanh, hieu manh, thien anh
hoc thieu » toc thieu, hoc hien
dung cong » dung trong
cong tap » cuong tap, cong tac, cong tan
tap doan » tap quan
doan cau » toan cau, doan dau, doan cap

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 tranh) or (tcanh tranh)) xay dung cong tap doan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thieu xanh - ((canh tranh) OR (tcanh tranh)) xay dung cong tap doan cau.
• Adding a wildcard symbol may retrieve word variants: hoc thieu xanh - ((canh tranh) or (tcanh tranh)) xay dung cong tap doan cau*.