Perhaps you should try some spelling variations:
luong tiet » luong thiet, luong viet, luong tien
trinh xay » trinh ky
dung quan » dung quang, dung luan, luong quan
quang yen » hung yen, quan den
quan va » quan vi, quan ha, luan va
va chat » van chat, va phat, cao chat
tiet ke » thiet ke, tiet kiem

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 quan va chat luong tiet ke ((quang yen) or ((hung or chung) yen))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: cong trinh xay dung quan va chat luong tiet ke ((quang yen) OR ((hung OR chung) yen)).
• Adding a wildcard symbol may retrieve word variants: cong trinh xay dung quan va chat luong tiet ke ((quang yen) or ((hung or chung) yen))*.