Perhaps you should try some spelling variations:
thieu xanh » chieu xanh, hieu manh, thien anh
lang cong » bang cong, hang cong, lang dong
dang cong » dung cong
tran van » luan van
van phan » van phong, van thanh, luan phan
phan lap » phan dau
van tan » van tuan, van ban, van tai

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

• Performing a fuzzy search may retrieve terms with similar spellings: toc thieu xanh - tran van tan ((lang cong) or (dang cong)) van phan lap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc thieu xanh - tran van tan ((lang cong) OR (dang cong)) van phan lap*.