Perhaps you should try some spelling variations:
chieu sach » chinh sach, chieu sang, chieu xanh
hanh hang » thanh hang, hang hang, hanh han
tong cong » trong cong, cong cong, dung cong
tap doanh » tap doan, lap doanh, tap danh
doanh bat » danh bat, doanh tai, doanh va
hang hoc » hang hoa, nang hoc, bang hoc
hoc tong » hoc trong, hoc thong, hoc cong
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: theo ((chieu sach) or (chiet tach)) - hanh hang hoc tong cong tap doanh bat~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo ((chieu sach) OR (chiet tach)) - hanh hang hoc tong cong tap doanh bat.
• Adding a wildcard symbol may retrieve word variants: theo ((chieu sach) or (chiet tach)) - hanh hang hoc tong cong tap doanh bat*.