Perhaps you should try some spelling variations:
chieu sang » chieu sach, chieu xanh, hieu lang
trong bang » trong ban, trong dang, trong tang
hieu manh » chieu xanh, hieu nganh, dieu hanh
bang phap » ban phap, nang phap, bang php
tung tam » vung tam, dung tam, tuong tac
phap cau » phan cau, pha cau, phap ca

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

• Performing a fuzzy search may retrieve terms with similar spellings: doc ((hieu manh) or (chieu sang)) - thanh ((tung tam) OR (trung tam)) dung trong bang phap cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doc ((hieu manh) OR (chieu sang)) - thanh ((tung tam) OR (trung tam)) dung trong bang phap cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doc ((hieu manh) or (chieu sang)) - thanh ((tung tam) OR (trung tam)) dung trong bang phap cau".
• Adding a wildcard symbol may retrieve word variants: doc ((hieu manh) or (chieu sang)) - thanh ((tung tam) OR (trung tam)) dung trong bang phap cau*.