Perhaps you should try some spelling variations:
dang cong » dung cong
theo hoc » theo hop, te hoc, cho hoc
thao hoc » thai hoc, than hoc, thao khoa
anh tang » anh bang, anh nang, anh sang
anh dang » anh dong, anh dung, anh bang
cua dang » cua cong, cua ban
cong tan » cong tac, cong san, cong thanh
tran cao » toan cao, tran chau, trang cho

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((theo hoc) or (thao hoc)) sach - ((anh tang) or (anh dang)) cua dang cong tan tran cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((theo hoc) OR (thao hoc)) sach - ((anh tang) OR (anh dang)) cua dang cong tan tran cao.
• Adding a wildcard symbol may retrieve word variants: ((theo hoc) or (thao hoc)) sach - ((anh tang) or (anh dang)) cua dang cong tan tran cao*.