Perhaps you should try some spelling variations:
thuong cong » thong cong, thuong con, thuong dong
hien xanh » hien nhanh, chieu xanh, hien khanh
hien hanh » dieu hanh
hanh tang » hanh trang, anh tang, hanh mang
ca thuong » cao thuong, cua thuong, va thuong
cong tan » cong tac, cong san, cong thanh
toan cao » toan tap
toan ban » van ban
tang ca » tang cua, hang ca, tang ma

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 ((hien xanh) OR (hien hanh)) - hanh tang ca thuong cong tan ((toan cao) OR (toan ban))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((hien xanh) or (hien hanh)) - hanh tang ca thuong cong tan ((toan cao) OR (toan ban))~".
• Adding a wildcard symbol may retrieve word variants: hoc ((hien xanh) or (hien hanh)) - hanh tang ca thuong cong tan ((toan cao) OR (toan ban))*.