Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
thanh tung » thanh cong
nhung cong » dung cong, thong cong, hang cong
hieu manh » chieu xanh, hieu nganh, dieu hanh
ve nhung » va nhung, tu nhung
tung ve » dung ve, tung le, tung va
dan bao » van bao, dam bao, dan ba
da bao » dam bao, va bao, du bao

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)) - thanh tung ve nhung cong ((dan bao) OR (da bao)) cap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho ((hieu manh) OR (chieu sach)) - thanh tung ve nhung cong ((dan bao) OR (da bao)) cap.
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho ((hieu manh) or (chieu sach)) - thanh tung ve nhung cong ((dan bao) OR (da bao)) cap".
• Adding a wildcard symbol may retrieve word variants: ho ((hieu manh) or (chieu sach)) - thanh tung ve nhung cong ((dan bao) OR (da bao)) cap*.