Perhaps you should try some spelling variations:
khoang cong » hoang cong, khoang trong, thong cong
chieu xanh » chieu sach, 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 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: hoc ((hieu manh) OR (chieu xanh)) - anh huong tao khoang cong dan toan cao~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((hieu manh) OR (chieu xanh)) - anh huong tao khoang cong dan toan cao".
• Adding a wildcard symbol may retrieve word variants: hoc ((hieu manh) OR (chieu xanh)) - anh huong tao khoang cong dan toan cao*.