Perhaps you should try some spelling variations:
nhung cong » dung cong, thong cong, hang cong
thieu xanh » chieu xanh, hieu manh, thien anh
hoc thieu » toc thieu, hoc hien
hanh hang » thanh hang, hang hang, hanh mang
hanh han » hanh nhan, hanh phan, hanh san
cong san » cong tac
toan ban » van ban

You may be able to get more results by adjusting your search query.

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