Perhaps you should try some spelling variations:
thanh tung » thanh cong
hieu xanh » chieu xanh, hieu manh, hieu nganh
dung cong » dung trong
doc hieu » toc thieu, hoc thieu, hoc hien
tung cua » trung cua, tuong cua, dung cua
cua dung » cua dang, cua dong, qua dung
toan cau » toan cao, toan tap, toan tai
toan ban » van ban

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

• Performing a fuzzy search may retrieve terms with similar spellings: doc hieu xanh - thanh tung cua dung cong trinh ((toan cau) or (toan ban))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doc hieu xanh - thanh tung cua dung cong trinh ((toan cau) OR (toan ban)).
• Adding a wildcard symbol may retrieve word variants: doc hieu xanh - thanh tung cua dung cong trinh ((toan cau) or (toan ban))*.