Perhaps you should try some spelling variations:
dung thanh » duong thanh, dong thanh, dang thanh
thieu xanh » chieu xanh, hieu manh, thien anh
hien hanh » dieu hanh
tong cong » trong cong, cong cong, dung cong
cong dung » cuong dung, cong dong, cong luong
thanh cau » thanh chau, thanh mau, nhanh cau
chinh ca » chinh va, chinh tai, chinh cho
chinh ta » chinh tai, chinh va, chinh tri

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) OR (hien hanh)) - hanh ((chinh ca) OR (chinh ta)) tong cong dung thanh cau~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((thieu xanh) or (hien hanh)) - hanh ((chinh ca) OR (chinh ta)) tong cong dung thanh cau~".
• Adding a wildcard symbol may retrieve word variants: hoc ((thieu xanh) or (hien hanh)) - hanh ((chinh ca) OR (chinh ta)) tong cong dung thanh cau*.