Perhaps you should try some spelling variations:
chieu sach » chinh sach, chieu sang, chieu xanh
hoac khong » hoa khong, hay khong, hoa thong
hanh hang » thanh hang, hang hang, hanh han
hoc khong » hoa khong, hoc hong, khoi khong
tap doanh » tap doan, lap doanh, tap danh
doanh bao » doanh bat, doanh ban, doanh bac
cong tap » cuong tap, cong tac, cong tan

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

• Performing a fuzzy search may retrieve terms with similar spellings: ho ((chieu sach) OR (chiet tach)) - hanh hang ((hoac khong) or (hoc khong)) cong tap doanh bao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho ((chieu sach) OR (chiet tach)) - hanh hang ((hoac khong) OR (hoc khong)) cong tap doanh bao.
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho ((chieu sach) OR (chiet tach)) - hanh hang ((hoac khong) or (hoc khong)) cong tap doanh bao".
• Adding a wildcard symbol may retrieve word variants: ho ((chieu sach) OR (chiet tach)) - hanh hang ((hoac khong) or (hoc khong)) cong tap doanh bao*.