Perhaps you should try some spelling variations:
hieu lang » chieu sang, hieu quang, nhieu tang
hanh manh » hanh mang, lanh manh, hoang manh
cua thong » cua thuong, cua khong, cua tong
thong anh » thong danh, thong lanh, trong anh
manh cua » doanh cua, ban cua
hong anh » hoang anh, hong hanh, dong anh
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: ho ((chinh sach) or (hieu lang)) - hanh manh cua thong ((thong anh) OR (hong anh)) tuan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho ((chinh sach) OR (hieu lang)) - hanh manh cua thong ((thong anh) OR (hong anh)) tuan cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho ((chinh sach) or (hieu lang)) - hanh manh cua thong ((thong anh) OR (hong anh)) tuan cau".
• Adding a wildcard symbol may retrieve word variants: ho ((chinh sach) or (hieu lang)) - hanh manh cua thong ((thong anh) OR (hong anh)) tuan cau*.