Perhaps you should try some spelling variations:
luong thit » luong thiet, luong thi, luong thien
huong thit » huong thi, thuong thiet, luong thiet
trinh xay » trinh ky
quang yen » hung yen, quan den
van chat » cao chat
ke quang » khe quang, le quang, ke 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 thit) OR (huong thit)) ke quang yen~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "cong trinh xay dung luan van chat ((luong thit) OR (huong thit)) ke quang yen".
• Adding a wildcard symbol may retrieve word variants: cong trinh xay dung luan van chat ((luong thit) OR (huong thit)) ke quang yen*.