Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
hoc chieu » hoc thieu, ho chieu, hoc hien
dung chau » dung cau, dung cho, dung cua
dung chat » dung nhat, luong chat, dung cho
thong dam » thuong dam, thong nam, trong dam
dam thanh » dao thanh, nam thanh, am thanh
thanh chu » thanh chau, thanh cha, thanh thu

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc chieu sach - thanh ((dung chau) or (dung chat)) thong thong dam thanh chu~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc chieu sach - thanh ((dung chau) OR (dung chat)) thong thong dam thanh chu.
• Adding a wildcard symbol may retrieve word variants: hoc chieu sach - thanh ((dung chau) or (dung chat)) thong thong dam thanh chu*.