Perhaps you should try some spelling variations:
cong quang » luong quang, thong quang, duong quang
quang phan » quang chan, quang phat, quang thanh
hieu lang » chieu sang, hieu quang, nhieu tang
trinh van » trinh han, trinh quan, trinh toan
dung cong » dung trong
trinh ve » trinh he, trinh va, trinh vi
phan cau » phan dau, phan cac, phan tu

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 (chinh sach)) - hanh ((trinh ve) or (trinh van)) dung cong quang phan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho ((hieu lang) OR (chinh sach)) - hanh ((trinh ve) OR (trinh van)) dung cong quang phan cau.
• Adding a wildcard symbol may retrieve word variants: ho ((hieu lang) or (chinh sach)) - hanh ((trinh ve) or (trinh van)) dung cong quang phan cau*.