Perhaps you should try some spelling variations:
hanh tranh » canh tranh, hanh trinh, hanh trang
chieu sang » chieu sach, chieu xanh, hieu lang
nhung cong » dung cong, thong cong, hang cong
hieu manh » chieu xanh, hieu nganh, dieu hanh
tranh va » tranh van, trang va, trinh va
cong dan » cong san, cong tan, huong dan
toan cau » toan cao, toan ban, toan tai
toan tap » toan ban

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

• Performing a fuzzy search may retrieve terms with similar spellings: doi ((hieu manh) or (chieu sang)) - hanh tranh va nhung cong dan ((toan cau) OR (toan tap))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi ((hieu manh) OR (chieu sang)) - hanh tranh va nhung cong dan ((toan cau) OR (toan tap)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "doi ((hieu manh) or (chieu sang)) - hanh tranh va nhung cong dan ((toan cau) OR (toan tap))".
• Adding a wildcard symbol may retrieve word variants: doi ((hieu manh) or (chieu sang)) - hanh tranh va nhung cong dan ((toan cau) OR (toan tap))*.