Perhaps you should try some spelling variations:
hieu lang » chieu sang, hieu quang, nhieu tang
chinh cua » chinh ca, hinh cua, chinh luan
chinh sua » chinh su, chinh luan, hinh su
cong danh » cuong danh, cong dan, cong thanh
danh toan » manh toan, anh toan, dan toan
ban cong » bang cong, van cong, phan cong
toan cau » toan cao, toan ban, toan tap

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 lang) or (trieu tinh)) - hanh ((chinh cua) or (chinh sua)) ban cong danh toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doc ((hieu lang) OR (trieu tinh)) - hanh ((chinh cua) OR (chinh sua)) ban cong danh toan cau.
• Adding a wildcard symbol may retrieve word variants: doc ((hieu lang) or (trieu tinh)) - hanh ((chinh cua) or (chinh sua)) ban cong danh toan cau*.