Perhaps you should try some spelling variations:
hieu quang » thieu quang, hieu quan, hieu qua
cong thanh » dong thanh, cong trinh, cong tan
thanh toan » thanh hoa, thanh san, tinh toan
hieu lang » chieu sang, nhieu tang, hieu van
dung cong » dung trong
hinh cua » chinh cua, sinh cua, tinh cua
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: ho ((hieu lang) or (hieu quang)) - hanh ((hinh cua) or (chinh tri)) dung cong thanh toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho ((hieu lang) OR (hieu quang)) - hanh ((hinh cua) OR (chinh tri)) dung cong thanh toan cau.
• Adding a wildcard symbol may retrieve word variants: ho ((hieu lang) or (hieu quang)) - hanh ((hinh cua) or (chinh tri)) dung cong thanh toan cau*.