Perhaps you should try some spelling variations:
thieu xanh » chieu xanh, hieu manh, thien anh
nhung cong » thong cong, nhung don, nhung lang
hoc thieu » toc thieu, hoc hien
dung cong » dung trong
hang cong » dang cong, hang nong, bang cong
cong tac » cong ty
van phan » van phong, van thanh, luan phan

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