Perhaps you should try some spelling variations:
lieu tinh » trieu tinh, diep tinh, bien tinh
hieu lang » chieu sang, hieu quang, nhieu tang
hanh dung » thanh dung, anh dung, hanh dong
luan dang » luan nang, luan danh, luan dong
dang cong » dung cong
cong san » cong tac
san phan » san pham, van phan, sat phan
phan cac » nhan cach, phan dau, phan lap

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: theo ((lieu tinh) OR (hieu lang)) - hanh dung luan dang cong san phan cac~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo ((lieu tinh) OR (hieu lang)) - hanh dung luan dang cong san phan cac".
• Adding a wildcard symbol may retrieve word variants: theo ((lieu tinh) OR (hieu lang)) - hanh dung luan dang cong san phan cac*.