Perhaps you should try some spelling variations:
hoc chieu » hoc thieu, ho chieu, hoc dieu
dung cong » dung trong
anh tang » anh bang, anh dang, anh sang
anh nang » ganh nang, anh bang, anh dang
cua dung » cua dang, cua dong, qua dung
cong dan » cong san, cong tan, huong dan
dan than » dan chan, ban than, van than
than cao » toan cao, thai cao, than cap

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) or (hoc hien)) sach - ((anh tang) OR (anh nang)) cua dung cong dan than cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((hoc chieu) OR (hoc hien)) sach - ((anh tang) OR (anh nang)) cua dung cong dan than cao.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((hoc chieu) or (hoc hien)) sach - ((anh tang) OR (anh nang)) cua dung cong dan than cao".
• Adding a wildcard symbol may retrieve word variants: ((hoc chieu) or (hoc hien)) sach - ((anh tang) OR (anh nang)) cua dung cong dan than cao*.