Perhaps you should try some spelling variations:
luong thiet » luong thien, luong thit, luong tiet
nhung luan » nhung lan, chung luan, nhung lua
khung luan » chung luan, dung luan, hang luan
quang yen » quan den
van chat » cao chat
nhung » nhuong, nchung, ndung
khung » khuong, kchung, kdung
hung » huong, chung, dung

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 ky ((nhung luan) OR (khung luan)) van chat luong thiet ke ((quang yen) or (hung yen))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: cong trinh ky ((nhung luan) OR (khung luan)) van chat luong thiet ke ((quang yen) OR (hung yen)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "cong trinh ky ((nhung luan) OR (khung luan)) van chat luong thiet ke ((quang yen) or (hung yen))".
• Adding a wildcard symbol may retrieve word variants: cong trinh ky ((nhung luan) OR (khung luan)) van chat luong thiet ke ((quang yen) or (hung yen))*.