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
hoa phan » hoa dan, co phan
phan lua » phap lua, phan dua, phap luat
cong dan » cong san, cong tan, huong dan
dan tho » dan thi, can tho, dai tho
tho lap » thao lap, tao lap, tho lai

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)) - hoa phan lua thong cong dan tho lap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi ((chieu sach) OR (chieu tinh)) - hoa phan lua thong cong dan tho lap.
• Adding a wildcard symbol may retrieve word variants: doi ((chieu sach) or (chieu tinh)) - hoa phan lua thong cong dan tho lap*.