Perhaps you should try some spelling variations:
luan chung » luan chinh
chung cong » nhung cong, chong cong, phung cong
hoc thieu » toc thieu, hoc hien
dong luan » dung luan, tong luan, dong xuan
ho chieu » theo chieu, doi chieu, mot chieu
cong tac » cong ty
toan cau » toan cao, toan ban, toan tai
toan tap » toan ban
ha dong » hoat dong, van dong

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((ho chieu) or (hoc thieu)) sach - ha dong luan chung cong tac ((toan cau) OR (toan tap))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((ho chieu) OR (hoc thieu)) sach - ha dong luan chung cong tac ((toan cau) OR (toan tap)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((ho chieu) or (hoc thieu)) sach - ha dong luan chung cong tac ((toan cau) OR (toan tap))".
• Adding a wildcard symbol may retrieve word variants: ((ho chieu) or (hoc thieu)) sach - ha dong luan chung cong tac ((toan cau) OR (toan tap))*.