Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
hieu nganh » vien nganh, hiem ngan, hieu manh
thanh cua » tranh cua, hanh cua, thanh cha
hang cong » dang cong, hang nong, bang cong
than cua » nhan cua, thai cua, ban cua
cong van » cong vang, cong san, song van
van phan » van phong, van thanh, luan phan

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc ((chieu sach) or (hieu nganh)) - nhanh ((thanh cua) OR (than cua)) hang cong van phan tu~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((chieu sach) OR (hieu nganh)) - nhanh ((thanh cua) OR (than cua)) hang cong van phan tu.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((chieu sach) or (hieu nganh)) - nhanh ((thanh cua) OR (than cua)) hang cong van phan tu".
• Adding a wildcard symbol may retrieve word variants: hoc ((chieu sach) or (hieu nganh)) - nhanh ((thanh cua) OR (than cua)) hang cong van phan tu*.