Perhaps you should try some spelling variations:
hieu quang » thieu quang, hieu quan, hieu qua
manh trung » manh tung, thanh trung, manh hung
hieu sang » chieu sang, hieu lang, nhieu tang
trung cua » truong cua, trung tuan, trung cap
dang cong » dung cong
cua dang » cua cong, cua ban
cong san » cong tac
san phan » san pham, van phan, sat phan
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: doc ((hieu sang) OR (hieu quang)) - manh trung cua dang cong san phan cau~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doc ((hieu sang) OR (hieu quang)) - manh trung cua dang cong san phan cau".
• Adding a wildcard symbol may retrieve word variants: doc ((hieu sang) OR (hieu quang)) - manh trung cua dang cong san phan cau*.