Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
hieu manh » chieu xanh, hieu nganh, dieu hanh
phan dang » phan dau, phan cong, nhan dan
cong anh » cong danh, hong anh, cong thanh
dong anh » hong anh, dong thanh, hoang anh
tuan ban » tuan bang, toan ban, luan ban
dang he » dung he, dang ha, bang he

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

• Performing a fuzzy search may retrieve terms with similar spellings: theo ((hieu manh) or (chieu sach)) - phan dang he thong ((cong anh) OR (dong anh)) tuan ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo ((hieu manh) OR (chieu sach)) - phan dang he thong ((cong anh) OR (dong anh)) tuan ban.
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo ((hieu manh) or (chieu sach)) - phan dang he thong ((cong anh) OR (dong anh)) tuan ban".
• Adding a wildcard symbol may retrieve word variants: theo ((hieu manh) or (chieu sach)) - phan dang he thong ((cong anh) OR (dong anh)) tuan ban*.