Perhaps you should try some spelling variations:
hieu quang » thieu quang, hieu quan, hieu qua
trung tuan » trung thanh, trung tam, tran tuan
trung cua » truong cua, trung cap, dung cua
hang cong » dang cong, hang nong, bang cong
cong doan » cong dan, cong hoan, dong doanh
doan van » doan va, hoang van, luan van

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 quang) or (chinh sach)) - thanh ((trung cua) OR (trung tuan)) hang cong doan van ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho ((hieu quang) OR (chinh sach)) - thanh ((trung cua) OR (trung tuan)) hang cong doan van ban.
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho ((hieu quang) or (chinh sach)) - thanh ((trung cua) OR (trung tuan)) hang cong doan van ban".
• Adding a wildcard symbol may retrieve word variants: ho ((hieu quang) or (chinh sach)) - thanh ((trung cua) OR (trung tuan)) hang cong doan van ban*.