Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
chau tinh » cuu tinh, ha tinh, cua tinh
dang cong » dung cong
van chat » cao chat
chat lua » chat cua, chat va, chat huu
lua dang » cua dang, lua sang, luan nang
cong tan » cong tac, cong san, cong thanh
tan dat » dan dat, ban dat, tan dac
dat may » dam may

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

• Performing a fuzzy search may retrieve terms with similar spellings: doi ((chieu sach) or (chau tinh)) - van chat lua dang cong tan dat may~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi ((chieu sach) OR (chau tinh)) - van chat lua dang cong tan dat may*.