Perhaps you should try some spelling variations:
thanh dung » thanh duong, thanh tung, thanh hung
nhung cong » thong cong, hang cong, nhung don
khoa viet » khoan viet, hoa viet, thoai viet
viet tach » viet sach, viet tech, viet thanh
dung cong » dung trong
dan thai » dang thai, dan thi, dan than
thai cao » tai cao, thoai cac, thuat cao

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

• Performing a fuzzy search may retrieve terms with similar spellings: khoa viet tach - thanh dung luan ((nhung cong) or (dung cong)) dan thai cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: khoa viet tach - thanh dung luan ((nhung cong) OR (dung cong)) dan thai cao.
• Adding a wildcard symbol may retrieve word variants: khoa viet tach - thanh dung luan ((nhung cong) or (dung cong)) dan thai cao*.