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 van » dao van, dat va, dam van
van van » van ban, tan van, san 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 van 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 van van dung luan phan lap.
• Adding a wildcard symbol may retrieve word variants: ((doc hieu) or (toc thieu)) tinh - thanh dat van van dung luan phan lap*.