Perhaps you should try some spelling variations:
hoc chieu » hoc thieu, ho chieu, hoc hien
doi chieu » doc hieu, doi chi, ho chieu
luan hung » luan chung, lan hung, luan ung
hung cong » nhung cong, hung cuong, phung cong
cong san » cong tac
phan tap » phan lap, pha tap, phan tu
han tap » han tai, toan tap, nhan tai

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 (doi chieu)) sach - sach dung luan hung cong san ((phan tap) OR (han tap))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((hoc chieu) OR (doi chieu)) sach - sach dung luan hung cong san ((phan tap) OR (han tap)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((hoc chieu) or (doi chieu)) sach - sach dung luan hung cong san ((phan tap) OR (han tap))".
• Adding a wildcard symbol may retrieve word variants: ((hoc chieu) or (doi chieu)) sach - sach dung luan hung cong san ((phan tap) OR (han tap))*.