Perhaps you should try some spelling variations:
nhung cong » dung cong, thong cong, hang cong
trinh nhan » trinh han, trinh phan, trinh nha
kieu tinh » trieu tinh, diep tinh, bien tinh
lieu tinh » trieu tinh, diep tinh, bien tinh
tung cua » trung cua, tuong cua, dung cua
nhan tai » hang tai, van tai, toan tai

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: so ((kieu tinh) OR (lieu tinh)) - thanh ((tung cua) or (dung luan)) nhung cong trinh nhan tai~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so ((kieu tinh) OR (lieu tinh)) - thanh ((tung cua) OR (dung luan)) nhung cong trinh nhan tai.
• The words AND, OR and NOT may confuse the search; try adding quotes: "so ((kieu tinh) OR (lieu tinh)) - thanh ((tung cua) or (dung luan)) nhung cong trinh nhan tai".
• Adding a wildcard symbol may retrieve word variants: so ((kieu tinh) OR (lieu tinh)) - thanh ((tung cua) or (dung luan)) nhung cong trinh nhan tai*.