Perhaps you should try some spelling variations:
thanh dat » thanh san, thanh hai, thanh van
luan phan » luan van, luan hoan
doc hieu » hoc thieu, hoc hien
van dung » van dong, xay dung, tin dung
phan lap » phan dau
dat tan » dat tai, tat tan, dac tan
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: ((doc hieu) or (toc thieu)) tinh - thanh dat tan van dung luan phan lap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((doc hieu) OR (toc thieu)) tinh - thanh dat tan van dung luan phan lap.
• Adding a wildcard symbol may retrieve word variants: ((doc hieu) or (toc thieu)) tinh - thanh dat tan van dung luan phan lap*.