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 tac » cong ty
tac phan » tac pham, tai phan, tac phat
phan lap » phan dau
thi lua » thi luan, thi dua, thi cua

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)) - hoang thi lua thong cong tac phan lap~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doi ((chieu sach) OR (chieu tinh)) - hoang thi lua thong cong tac phan lap".
• Adding a wildcard symbol may retrieve word variants: doi ((chieu sach) OR (chieu tinh)) - hoang thi lua thong cong tac phan lap*.