Perhaps you should try some spelling variations:
luong thiet » luong thien, luong thit, luong tiet
trinh xay » trinh ky
khe quang » che quang, nghe quang, le quang
van chat » cao chat
ke quang » le quang, ke quan, che quang
de quang » le quang, do quang, de quan
luan » quan, lan

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

• Performing a fuzzy search may retrieve terms with similar spellings: cong trinh xay dung luan van chat luong thiet ((((ke quang) OR (de quang))) or (khe quang)) yen~.
• If you are trying to use Boolean operators, they must be ALL CAPS: cong trinh xay dung luan van chat luong thiet ((((ke quang) OR (de quang))) OR (khe quang)) yen.
• The words AND, OR and NOT may confuse the search; try adding quotes: "cong trinh xay dung luan van chat luong thiet ((((ke quang) OR (de quang))) or (khe quang)) yen".
• Adding a wildcard symbol may retrieve word variants: cong trinh xay dung luan van chat luong thiet ((((ke quang) OR (de quang))) or (khe quang)) yen*.