Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
thong than » thong thanh, thong phan, thong nhan
hieu manh » chieu xanh, hieu nganh, dieu hanh
hanh mang » nhanh mang, hanh trang, nhanh lang
cua thong » cua thuong, cua khong, suat thong
than toan » thanh toan, than tuan, thuat toan
cua tong » cua cong, cua dong, cua nong
toan cau » toan cao, toan ban, toan tap

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

• Performing a fuzzy search may retrieve terms with similar spellings: theo ((hieu manh) or (chieu sach)) - hanh mang ((cua thong) OR (cua tong)) thong than toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo ((hieu manh) OR (chieu sach)) - hanh mang ((cua thong) OR (cua tong)) thong than toan cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo ((hieu manh) or (chieu sach)) - hanh mang ((cua thong) OR (cua tong)) thong than toan cau".
• Adding a wildcard symbol may retrieve word variants: theo ((hieu manh) or (chieu sach)) - hanh mang ((cua thong) OR (cua tong)) thong than toan cau*.