Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
doanh phan » doanh nhan, doan phan, doanh thanh
trung dung » ung dung, trung uong, trinh dung
hieu lang » chieu sang, hieu quang, nhieu tang
duc trung » dac trung, dung trung, do trung
phan duc » pham duc, phan tu, phan dau
dung dat » dung va, dung tai
dat than » dat thanh, dan than, dat khanh
than cap » khan cap, thanh lap, thanh cac

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

• Performing a fuzzy search may retrieve terms with similar spellings: ho ((hieu lang) or (chieu sach)) - doanh phan duc trung dung dat than cap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho ((hieu lang) OR (chieu sach)) - doanh phan duc trung dung dat than cap.
• Adding a wildcard symbol may retrieve word variants: ho ((hieu lang) or (chieu sach)) - doanh phan duc trung dung dat than cap*.