Perhaps you should try some spelling variations:
trinh xay » trinh ky
dung nang » dun nang, dung dang, dung quang
nang van » dang van, tang van, lang van
van chat » cao chat
thi kieu » thi kiem, thi kim, thi lien
quan yen » quang yen, quan den, xuan yen
thi ke » thi le, thi 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 nang van chat luong ((thi ke) OR (thi kieu)) quan yen~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "cong trinh xay dung nang van chat luong ((thi ke) OR (thi kieu)) quan yen*".