Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
thong cong » trong cong, tong cong, thong thong
vang thong » mang thong, vang thung, vang trong
trung dap » trung cap, trung dai, trung lap
trung dam » trung tam, trung dai, trong dam
cong vang » cong lang, cong quang, cong ngang
ho chieu » theo chieu, hoc thieu, doi chieu

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

• Performing a fuzzy search may retrieve terms with similar spellings: ho chieu sach - thanh ((trung dap) OR (trung dam)) thong cong vang thong ke~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho chieu sach - thanh ((trung dap) OR (trung dam)) thong cong vang thong ke".
• Adding a wildcard symbol may retrieve word variants: ho chieu sach - thanh ((trung dap) OR (trung dam)) thong cong vang thong ke*.