Perhaps you should try some spelling variations:
luan thong » luan phong, luan tuong, luat thong
thong dong » thong duong, thuong dong, thong cong
hoc chieu » hoc thieu, ho chieu, hoc hien
thinh dan » thinh doan, trinh dan, hinh dan
dan luan » doanh luan, dung luan, tang luan
dong dat » dong vat, dung dat, dong ha
dat phan » data phan, dam phan, sat phan

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: ((hoc chieu) or (toc thieu)) sang - thinh dan luan thong dong dat phan tu~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((hoc chieu) OR (toc thieu)) sang - thinh dan luan thong dong dat phan tu.
• Adding a wildcard symbol may retrieve word variants: ((hoc chieu) or (toc thieu)) sang - thinh dan luan thong dong dat phan tu*.