Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
nhung cong » dung cong, thong cong, hang cong
trung vap » trung va, trung van, trung lap
trung cap » truong cao, trung tam
van thanh » ban thanh, van tuan
ho chieu » theo chieu, hoc thieu, doi chieu
tan toan » tan tran, tap toan, van toan

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