Perhaps you should try some spelling variations:
luong thiet » luong thit, luong tiet, tuong thiet
luong thien » luong tien, truong thien, luong thi
trinh xay » trinh ky
che quang » chu quang, che quan, khe quang
van chat » cao chat
ve quan » va quan, van quan, le quang
luan » 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) OR (luong thien)) ((che quang) or (ve quan)) yen~.
• If you are trying to use Boolean operators, they must be ALL CAPS: cong trinh xay dung luan van chat ((luong thiet) OR (luong thien)) ((che quang) OR (ve quan)) yen.
• The words AND, OR and NOT may confuse the search; try adding quotes: "cong trinh xay dung luan van chat ((luong thiet) OR (luong thien)) ((che quang) or (ve quan)) yen".
• Adding a wildcard symbol may retrieve word variants: cong trinh xay dung luan van chat ((luong thiet) OR (luong thien)) ((che quang) or (ve quan)) yen*.