Perhaps you should try some spelling variations:
hieu quang » thieu quang, hieu quan, hieu qua
hanh trung » thanh trung, hanh trang, manh trung
hieu lang » chieu sang, nhieu tang, hieu van
cua thong » cua thuong, cua tong, suat thong
cua khong » hua khong, cua phuong, cua thuong
san chinh » lan chinh, van chinh, ban chinh
chinh cau » chinh chau, chinh ca, chinh can
cong san » cong tac

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 lang) OR (hieu quang)) - hanh trung ((cua thong) or (cua khong)) cong san chinh cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo ((hieu lang) OR (hieu quang)) - hanh trung ((cua thong) OR (cua khong)) cong san chinh cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo ((hieu lang) OR (hieu quang)) - hanh trung ((cua thong) or (cua khong)) cong san chinh cau".
• Adding a wildcard symbol may retrieve word variants: theo ((hieu lang) OR (hieu quang)) - hanh trung ((cua thong) or (cua khong)) cong san chinh cau*.