Perhaps you should try some spelling variations:
manh tuong » manh tung, manh cuong, minh tuong
chieu sang » chieu sach, chieu xanh, nhieu tang
nhung cong » dung cong, thong cong, hang cong
hieu lang » hieu quang, nhieu tang, hieu van
thanh cac » hanh cac, thanh ca, tranh cac
thanh bac » nhanh bac, thanh bai, thanh san
tuong va » truong va, thuong va, luong va
cong dan » cong san, cong tan, huong dan

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 lang) OR (chieu sang)) - manh tuong va nhung cong dan ((thanh cac) or (thanh bac))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi ((hieu lang) OR (chieu sang)) - manh tuong va nhung cong dan ((thanh cac) OR (thanh bac)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "doi ((hieu lang) OR (chieu sang)) - manh tuong va nhung cong dan ((thanh cac) or (thanh bac))".
• Adding a wildcard symbol may retrieve word variants: doi ((hieu lang) OR (chieu sang)) - manh tuong va nhung cong dan ((thanh cac) or (thanh bac))*.