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, nhung don
doi chieu » doc hieu, doi chi, ho chieu
hang cong » dang cong, hang nong, bang cong
dan than » dan chan, ban than, van than
than cao » toan cao, thai cao, than cap

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

• Performing a fuzzy search may retrieve terms with similar spellings: doi chieu sach - ((thanh trung) OR (thanh tung)) ha ((nhung cong) or (hang cong)) dan than cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi chieu sach - ((thanh trung) OR (thanh tung)) ha ((nhung cong) OR (hang cong)) dan than cao.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doi chieu sach - ((thanh trung) OR (thanh tung)) ha ((nhung cong) or (hang cong)) dan than cao".
• Adding a wildcard symbol may retrieve word variants: doi chieu sach - ((thanh trung) OR (thanh tung)) ha ((nhung cong) or (hang cong)) dan than cao*.