Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
hoc chieu » hoc thieu, ho chieu, hoc hien
trinh cua » tinh cua, trinh luat, trinh quan
dung cong » dung trong
cong san » cong tac
chay cao » cay cao, nha cao, cay co
chat cao » chat co, chat cho, chat bao

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 - hanh ((trinh cua) or (tinh chat)) dung cong san ((chay cao) or (chat cao))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc chieu sach - hanh ((trinh cua) OR (tinh chat)) dung cong san ((chay cao) OR (chat cao)).
• Adding a wildcard symbol may retrieve word variants: hoc chieu sach - hanh ((trinh cua) or (tinh chat)) dung cong san ((chay cao) or (chat cao))*.