Perhaps you should try some spelling variations:
nhung luan » nhung lan, chung luan, nhung lua
khung luan » chung luan, dung luan, hang luan
luong thit » luong thiet, luong thi, huong thit
quang yen » quan den
van chat » cao chat
thit ke » thiet ke, thie ke, thien ke
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 thit 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 thit 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 thit 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 thit ke ((quang yen) or (hung yen))*.