Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
huong luan » huong lan, cuong luan, huong loan
luan thong » luan phong, luan tuong, luat thong
thong cong » trong cong, tong cong, thong thong
chua xang » chua nang, chuc nang, chu bang
cong dan » cong san, cong tan, huong dan
dan than » dan chan, ban than, van than
than cao » toan cao, thai cao, than cap

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

• Performing a fuzzy search may retrieve terms with similar spellings: theo ((chieu sach) or (chua xang)) - anh huong luan thong cong dan than cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo ((chieu sach) OR (chua xang)) - anh huong luan thong cong dan than cao*.