Perhaps you should try some spelling variations:
quang trung » truong trung
trung cong » truong cong, trong cong, trung uong
chua xang » chua nang, chuc nang, chu bang
hanh dong » anh dong, ha dong
chu xanh » chu manh, chieu xanh, chuc danh
anh dung » anh dong, anh huong, sach dung
cong san » cong tac
san phan » san pham, van phan, sat phan

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

• Performing a fuzzy search may retrieve terms with similar spellings: theo ((chu xanh) OR (chua xang)) - ((hanh dong) or (anh dung)) quang trung cong san phan tu~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo ((chu xanh) OR (chua xang)) - ((hanh dong) OR (anh dung)) quang trung cong san phan tu.
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo ((chu xanh) OR (chua xang)) - ((hanh dong) or (anh dung)) quang trung cong san phan tu".
• Adding a wildcard symbol may retrieve word variants: theo ((chu xanh) OR (chua xang)) - ((hanh dong) or (anh dung)) quang trung cong san phan tu*.