Perhaps you should try some spelling variations:
khoang cong » hoang cong, khoang trong, thong cong
chieu sach » chinh sach, chiet tach, chieu sang
chieu xanh » chieu sang, chieu tinh
tao khoang » tao zhang
hieu manh » hieu nganh, dieu hanh, hien hanh
huong tao » huong tac, huong tam, phuong thao
cong dan » cong san, cong tan, huong dan
dan toan » van toan, dan than, manh 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: hoc ((hieu manh) or (((chieu xanh) OR (chieu sach)))) - anh huong tao khoang cong dan toan ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((hieu manh) OR (((chieu xanh) OR (chieu sach)))) - anh huong tao khoang cong dan toan ban.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((hieu manh) or (((chieu xanh) OR (chieu sach)))) - anh huong tao khoang cong dan toan ban".
• Adding a wildcard symbol may retrieve word variants: hoc ((hieu manh) or (((chieu xanh) OR (chieu sach)))) - anh huong tao khoang cong dan toan ban*.