Perhaps you should try some spelling variations:
thong cong » trong cong, tong cong, thong thong
hien xanh » hien hanh, hien nhanh, chieu xanh
chinh cua » chinh ca, hinh cua, chinh luan
chinh sua » chinh su, chinh luan, hinh su
cong san » cong tac
san than » sang than, san thanh, ban than
than ban » thanh ban, toan ban, than man

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

• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc hien xanh - hanh ((chinh cua) OR (chinh sua)) thong cong san than ban~".
• Adding a wildcard symbol may retrieve word variants: hoc hien xanh - hanh ((chinh cua) OR (chinh sua)) thong cong san than ban*.