Perhaps you should try some spelling variations:
thanh tung » thanh cong
dung cong » dung trong
cong luan » tong luan, cong tuan, dong luan
luan phan » luan van, luan hoan
doc hieu » toc thieu, hoc thieu
tam dung » tam duong, tac dung, tan dung
phan dau » phan tu, hang dau

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 (hoc hien)) xanh - ((thanh trung) OR (thanh tung)) tam dung cong luan phan dau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((doc hieu) OR (hoc hien)) xanh - ((thanh trung) OR (thanh tung)) tam dung cong luan phan dau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((doc hieu) or (hoc hien)) xanh - ((thanh trung) OR (thanh tung)) tam dung cong luan phan dau".
• Adding a wildcard symbol may retrieve word variants: ((doc hieu) or (hoc hien)) xanh - ((thanh trung) OR (thanh tung)) tam dung cong luan phan dau*.