Perhaps you should try some spelling variations:
luong thiet » luong thien, luong thit, luong tiet
trinh xay » trinh ky
quan doan » quan hoang, chuan doan, chan doan
dung lam » dung luan, dung tai, dung dat
van chat » cao chat
quan den » quan he, quan doi
lam van » lam san, nam van, dam van

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 lam van chat luong thiet ke ((quan den) OR (quan doan))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "cong trinh xay dung lam van chat luong thiet ke ((quan den) OR (quan doan))".
• Adding a wildcard symbol may retrieve word variants: cong trinh xay dung lam van chat luong thiet ke ((quan den) OR (quan doan))*.