Perhaps you should try some spelling variations:
thong cong » trong cong, tong cong, thong thong
tieu xanh » tieu danh, chieu xanh, dieu hanh
hanh dinh » thanh dinh, hinh dinh, hanh tinh
dung cong » dung trong
dinh cua » dinh cuu, sinh cua, dinh cu
lang van » dang van, tang van, hoang van
van dau » van dao, phan dau

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

• Performing a fuzzy search may retrieve terms with similar spellings: theo tieu xanh - hanh dinh cua ((thong cong) or (dung cong)) lang van dau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo tieu xanh - hanh dinh cua ((thong cong) OR (dung cong)) lang van dau*.