Perhaps you should try some spelling variations:
trinh xay » trinh ky
dung lang » dung dang, dung nang, dung land
lang van » dang van, tang van, hoang van
van chat » cao chat
thi kiem » thi kim, thi lien, thi hien
xuan yen » xuan tuyen, quang yen, xuan dien
thi ke » thi le, thi kieu

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 lang van chat luong ((thi ke) OR (thi kiem)) xuan yen~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "cong trinh xay dung lang van chat luong ((thi ke) OR (thi kiem)) xuan yen*".