Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
canh thanh » canh tranh, danh thanh, anh thanh
qua truong » cua truong, quang truong, xuan truong
hoc chieu » hoc thieu, ho chieu, hoc hien
qua trong » quan trong, qua trinh, qua song
van toan » van tuan, van tan, van thanh
toan cao » toan ban, toan tap

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

• If you are trying to use Boolean operators, they must be ALL CAPS: hoc chieu sach - canh thanh ((qua truong) OR (qua trong)) phung van toan cao~.
• Adding a wildcard symbol may retrieve word variants: hoc chieu sach - canh thanh ((qua truong) or (qua trong)) phung van toan cao*.