Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
chieu tinh » trieu tinh, lieu tinh, chau tinh
thong cong » trong cong, tong cong, thong thong
lua thong » luat thong, luat thuong, suat thong
cong luan » tong luan, cong tuan, dong luan
van chat » cao chat
chat lua » chat cua, chat va, chat huu
van tap » van tai, van tan, han tap

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

• Performing a fuzzy search may retrieve terms with similar spellings: doi ((chieu sach) OR (chieu tinh)) - van chat lua thong cong luan van tap~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doi ((chieu sach) OR (chieu tinh)) - van chat lua thong cong luan van tap*".