Perhaps you should try some spelling variations:
chieu sach » chinh sach, chieu sang, chieu xanh
nhung cong » dung cong, thong cong, hang cong
lang cua » mang cua, hang cua, long cua
dong cua » dung cua, cong cua, huong cua
cong dan » cong san, cong tan, huong dan
dan than » dan chan, ban than, van than
than tap » toan tap, han tap, phan tap

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)) - nhanh ((lang cua) or (dong cua)) nhung cong dan than tap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo ((chieu sach) OR (chiet tach)) - nhanh ((lang cua) OR (dong cua)) nhung cong dan than tap.
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo ((chieu sach) OR (chiet tach)) - nhanh ((lang cua) or (dong cua)) nhung cong dan than tap".
• Adding a wildcard symbol may retrieve word variants: theo ((chieu sach) OR (chiet tach)) - nhanh ((lang cua) or (dong cua)) nhung cong dan than tap*.