Perhaps you should try some spelling variations:
dong thong » thong thong, nong thon, dong thanh
chieu sang » chieu sach, chieu xanh, nhieu tang
hieu lang » hieu quang, nhieu tang, hieu van
hanh luat » nganh luat, hang luan, hanh lam
quan doan » quan hoang, chuan doan, chan doan
luat van » luan van, luat dan, luat va
doan tap » toan tap, doan cap, doanh tai

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc ((hieu lang) or (chieu sang)) - hanh luat van dong thong quan doan tap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((hieu lang) OR (chieu sang)) - hanh luat van dong thong quan doan tap*.