Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
khong cong » thong cong, khong cang, chong cong
hanh tang » hanh trang, anh tang, hanh tung
hanh mang » nhanh mang, hanh trang, nhanh lang
cua khong » hua khong, cua phuong, cua thuong
cong vinh » cong trinh, trong vinh, cong viec
vinh toan » tinh toan, hinh toan, minh toan
toan ban » van ban

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

• Performing a fuzzy search may retrieve terms with similar spellings: ho ((chieu sach) or (diep tinh)) - ((hanh tang) OR (hanh mang)) cua khong cong vinh toan ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho ((chieu sach) OR (diep tinh)) - ((hanh tang) OR (hanh mang)) cua khong cong vinh toan ban.
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho ((chieu sach) or (diep tinh)) - ((hanh tang) OR (hanh mang)) cua khong cong vinh toan ban".
• Adding a wildcard symbol may retrieve word variants: ho ((chieu sach) or (diep tinh)) - ((hanh tang) OR (hanh mang)) cua khong cong vinh toan ban*.