Perhaps you should try some spelling variations:
hieu manh » chieu xanh, hieu nganh, dieu hanh
hieu lang » chieu sang, hieu quang, nhieu tang
cong manh » duong manh, cong thanh, hoang manh
cong danh » cuong danh, cong dan, cong thanh
chinh va » chinh ta, chinh tai, hanh va
va trong » va truong, va thong, va tuong
tuan cau » toan cau, quan cau, tuan cu

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

• Performing a fuzzy search may retrieve terms with similar spellings: doi ((hieu manh) or (hieu lang)) - hanh chinh va trong ((cong manh) OR (cong danh)) tuan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi ((hieu manh) OR (hieu lang)) - hanh chinh va trong ((cong manh) OR (cong danh)) tuan cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doi ((hieu manh) or (hieu lang)) - hanh chinh va trong ((cong manh) OR (cong danh)) tuan cau".
• Adding a wildcard symbol may retrieve word variants: doi ((hieu manh) or (hieu lang)) - hanh chinh va trong ((cong manh) OR (cong danh)) tuan cau*.