Perhaps you should try some spelling variations:
hieu nganh » vien nganh, hiem ngan, hieu manh
chieu sang » chieu sach, chieu xanh, hieu lang
canh trang » canh tranh, hanh trang, banh trang
va thong » va phuong, he thong, va cong
cong dan » cong san, cong tan, huong dan
dan than » dan chan, ban than, van than
than cau » toan cau, phan cau, than cap

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

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