Perhaps you should try some spelling variations:
truong thien » trong thien, truong chien, truong nghien
luong tiet » luong thiet, luong viet, luong tien
trinh xay » trinh ky
van chat » cao chat
quan yen » quang yen, quan den, xuan yen
ke quan » ve quan, te quan, he quan
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 tiet) or (truong thien)) ke quan yen~.
• If you are trying to use Boolean operators, they must be ALL CAPS: cong trinh xay dung luan van chat ((luong tiet) OR (truong thien)) ke quan yen.
• Adding a wildcard symbol may retrieve word variants: cong trinh xay dung luan van chat ((luong tiet) or (truong thien)) ke quan yen*.