Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
hieu manh » chieu xanh, hieu nganh, dieu hanh
banh tran » banh trang, ban tran, canh tranh
dung cong » dung trong
cong doan » cong dan, cong hoan, dong doanh
tran van » luan van
van dung » van dong, xay dung, tin dung
phan cau » phan dau, phan tu, phan lap
phan cac » nhan cach, phan dau, phan lap

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 manh) or (chieu sach)) - banh tran van dung cong doan ((phan cau) OR (phan cac))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho ((hieu manh) OR (chieu sach)) - banh tran van dung cong doan ((phan cau) OR (phan cac)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho ((hieu manh) or (chieu sach)) - banh tran van dung cong doan ((phan cau) OR (phan cac))".
• Adding a wildcard symbol may retrieve word variants: ho ((hieu manh) or (chieu sach)) - banh tran van dung cong doan ((phan cau) OR (phan cac))*.