Perhaps you should try some spelling variations:
phuong cong » phuong dong, phong cong, phung cong
luan phuong » lan phuong, quang phuong, doan phuong
thieu xanh » chieu xanh, hieu manh, thien anh
hanh cong » thanh cong, hang cong, hanh dong
dang cong » dung cong
cong tan » cong tac, cong san, cong thanh
tan van » tran van, tang van, luan van

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 - ((hanh cong) or (dang cong)) luan phuong cong tan van ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc thieu xanh - ((hanh cong) OR (dang cong)) luan phuong cong tan van ban*.