Perhaps you should try some spelling variations:
nhung cong » dung cong, hang cong, nhung don
thong cong » trong cong, tong cong, thong thong
chi xanh » chi anh, chi danh, chi hanh
chinh va » chinh ta, chinh tai, hanh va
than cau » toan cau, than cap, thanh chau
phan cau » phan dau, phan cac, phan tu
doi chi » doi khi

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: doi chi xanh - hanh chinh va ((nhung cong) OR (thong cong)) tan ((than cau) OR (phan cau))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doi chi xanh - hanh chinh va ((nhung cong) OR (thong cong)) tan ((than cau) or (phan cau))~".
• Adding a wildcard symbol may retrieve word variants: doi chi xanh - hanh chinh va ((nhung cong) OR (thong cong)) tan ((than cau) or (phan cau))*.