Perhaps you should try some spelling variations:
thanh dung » thanh duong, thanh tung, thanh hung
cong phan » cong nhan, cong khan, chong phap
phan phan » phap phan, phan phat, than phan
doc hieu » hoc thieu, hoc hien
dung lan » dung luan, dung land, dung lam
van cong » van dong, van phong, phan cong
phan lap » phan dau
lan van » luan van, lang van, tan van

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) OR (toc thieu)) sang - thanh dung lan van cong phan phan lap~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((doc hieu) OR (toc thieu)) sang - thanh dung lan van cong phan phan lap".
• Adding a wildcard symbol may retrieve word variants: ((doc hieu) OR (toc thieu)) sang - thanh dung lan van cong phan phan lap*.